Articles Dr. Medalie AKA
DrLullaby was referenced in

Waking Up at 4 A.M. Every Day Is the Key to Success. Or to Getting a Cold.

The reality of "dream crowns"

La realidad de los 'coronasueños'

How to Wake Up Early

La realidad de los 'coronasueños'

Qué hay detrás de los "coronasueños"

Ana Garcia-Pereze PhD

Clinical Psychologist with a specialty in Health Psychology

Dr. Garcia is a bilingual Licensed Clinical Psychologist in Virginia and Puerto Rico, and a member of the American Psychological Association. She earned her Ph.D. in Clinical Psychology at Carlos Albizu University in Puerto Rico. She completed an American Psychology Association (APA) internship at the Albizu Clinic in San Juan, Puerto Rico. Dr. Garcia’s focuses are were children, adolescents, and their families who experienced sexual abuse. Additionally, she completed an APA Postdoctoral Fellowship in Clinical Psychology at the Veterans Affairs Caribbean Health Care system.

Dr. Garcia spent the last four years working with Veterans at the Veterans Affairs as a Health psychologist and, eventually, a Pain Psychologist. She attended to Veterans with various physical and psychological concerns of different ages, racial backgrounds, LGBT communities, beliefs, and War Eras with multiple circumstances and diagnoses. As a health psychologist, she has also worked with patients with medical conditions, chronic pain, trauma, anxiety, and
depression, among others. During her clinical practice, she has implemented short-term interventions and Evidence-Based Practices including, but not limited to, treatments such as Behavioral Activation, Cognitive Behavioral Therapy (CBT), Cognitive Behavioral Therapy for Chronic Pain (CBT-CP), and Acceptance and Commitment Therapy (ACT). At Dr. Lullaby, Dr. Garcia assists patients in engaging in new helpful behaviors that facilitate better sleep. She uses evidence-based therapy to manage insomnia and guides patients in identifying harmful sleep habits with a
collaborative approach.

Fun Sleep Facts About Dr. Garcia:

Optimal sleep: 9:30 PM -5:30

Peak alertness: 7:00 AM – 12:00 PM

Favorite sleep tip: Knowledge itself doesn’t change behavior; It is in the application of that knowledge that we start seeing changes in our life.

Sleep hygiene strategies are skills that you can start doing today. Such as, keeping a sleep schedule. wake up every morning at the same time, even on weekends. Go to bed when sleepy and not when feeling tired. Avoid using the bed for activities other than sleep and sex. Maintain a healthy diet and exercise frequently.

Natalia David, Ph.D., DBSM

Director of Training

Dr. Natalia David is a board certified Behavioral Sleep Medicine Specialist and Health Psychologist. She received her doctorate from Alliant International University in Los Angeles, CA, and did her clinical training at Baylor Scott and White Medical Center in Temple, TX, and postdoctoral fellowship at the James A. Haley VA in Tampa, FL.

Dr. David’s career in Behavioral Sleep Medicine flourished during her tenure as Assistant Professor at the University of Texas Southwestern in Dallas, TX. Presently, she works primarily with adults with chronic insomnia, hypersomnia, circadian rhythm sleep disorders, and other behaviorally and cognitively mediated sleep disturbances. She is specifically interested in the overlap between sleep disturbance and chronic physical and mental health illness.

Fun Sleep Facts About Dr. David:

Optimal Sleep: 10:30 pm – 7 am

Peak alertness: 10 am – 2 pm

Favorite Sleep tip: Relaxation and meditation are key to helping your mind and body unwind and prepare for sleep, allowing you to achieve a more peaceful and restorative sleep, as well as improvements in mental and physical well-being.

Sheryl Leytham PhD

Clinical Psychologist with a specialty in Health Psychology

Sheryl Leytham is a clinical health psychologist who specializes in health issues. She has worked extensively in a major medical setting treating a variety of health issues including sleep disorders, pain disorders, eating disorders, rehabilitation and cancer treatment. She also worked at the VA treating primarily health issues including sleep disorders, pain disorders and IBS. This clinician was the lead instructor for a multi-state class on behavioral strategies to manage chronic pain. She has published and presented in multiple national conferences on the behavioral management of health conditions and the overlap of stress and physical symptoms.

This psychologist was department chair and a tenured faculty at Grand View University in Des Moines, Iowa

Sheryl Leytham has a PhD in Clinical Psychology from St Louis University, a Masters in Psychology from California State University and is a member of APA, ASCH  and the National Register.  She served as a national trainer in medical hypnosis for the VA.  This clinician is licensed in Iowa and Illinois as a Clinical Psychologist and a Health Service Provider.

Fun Sleep Facts About Dr. Leytham:

Reading, listening to relaxing music or, drinking a cup of herbal tea, using lavender and other calming scents, or taking a warm bath or shower can improve sleep

Exposure to noise at night can suppress immune function even if the sleeper doesn’t wake.

One of the biggest sleep distractions is 24-hour internet access

Exercise usually improves sleep patterns.  Strenuous exercise right before bed may keep you awake

Binge-watching television or using your mobile phone or computer late into the night affects your natural body’s rhythm and can make it more difficult to fall asleep.

Tyler Rickards, PhD, ABPP-CN


Dr. Rickards completed his doctoral degree in Clinical Psychology at the University of Alabama at Birmingham, internship at the Palo Alto VA, and post-doctoral fellowship in Rehabilitation Neuropsychology in the Johns Hopkins PM&R Department. He has completed board certification in Clinical Neuropsychology, teaches a course at Johns Hopkins, and has significant experience with adults with cognitive disorders due to TBI, stroke, or other neurological conditions.

Dr. Rickards appreciates the major impact that poor quality sleep can have on daily function – specifically mood and thinking skills – and the impact that improved sleep can have on someone’s life.

Fun Sleep Facts About Dr. Jones:

Optimal sleep: 9:00 PM – 5:00 AM 

Peak alertness: 8:00 AM – 11:00 AM

Favorite sleep tip: Morning exercise and prioritizing important activities earlier in the day (when I’m most alert!) can help most people be productive and feel better throughout the day. And importantly, there CAN be a place for a good cup of coffee in your life!

Sarah Zwetzig, PhD, LP


Dr. Zwetzig completed her PhD in Counseling Psychology from University of Northern Colorado and matched to University of Texas Health Science Center at San Antonio for her predoctoral internship. During internship, she worked as a research therapist for STRONG STAR, a national research organization guiding studies in trauma and resilience in the military. Dr. Zwetig gained expertise in evidence-based therapy for PTSD, and continued on with UT Health San Antonio for her 2-year postdoctoral fellowship. Dr. Zwetig’s postdoctoral fellowship was focused on treating insomnia and nightmares and active duty service members, many of which had comorbidities such as PTSD, depression, and anxiety. She specializes in treating insomnia and nightmares in adults.

Fun Sleep Facts About Dr. Zwetzig:

Optimal sleep: 10:30 PM – 7:00 AM
Peak alertness: 9:00 AM – 1:30 PM
Favorite sleep tip: Wear blue light glasses in the evening, especially if you’re using screens! Have several pairs in different rooms.

Christine Mason, Ph.D., DBSM


Dr. Mason is a Sleep Psychologist board certified in Behavioral Sleep Medicine. She received her Ph.D. in Health Psychology from the University of North Carolina at Charlotte, completed an internship in Clinical Health Psychology from Henry Ford Health System in Detroit, Michigan, and concluded her training with a postdoctoral fellowship in Health and Bariatric Psychology at Rush University Medical Center in Chicago, Illinois. 

She has three years of specialized clinical and research training in sleep disorders under the supervision of experts at Rush University Medical Center, Northwestern University Feinberg School of Medicine, and Henry Ford Health System. Specific areas of interest and expertise include sleep and circadian rhythm disorders in adults, comorbid sleep, anxiety and depressive disorders in patients with heart disease, nonpharmacological interventions for obesity/weight management, and medication/treatment adherence.

Fun Sleep Facts About Dr. Mason:

Optimal sleep: 10:45 PM – 7:00 AM
Peak alertness: 7:30 AM – 11:30 AM
Favorite sleep tip: Wake up, get out of bed, and expose your eyes to light. Try to do this at the same time each day, and feel the benefits of this practice on your level of sleepiness at night.

Lisa Medalie, PsyD, RPSGT, DBSM


Hi, I’m Dr. Medalie, AKA DrLullaby. Since so few of us are board-certified as Insomnia Specialists, yet so many people struggle to sleep, I brought the work I use with patients to your finger-tips.


  • Board-Certified Adult and Pediatric Behavioral Sleep Medicine Specialist
  • Harvard Medical School, Sleep Research Postdoctoral Fellowship
  • Johns Hopkins School of Medicine, Predoctoral Internship
  • University of California San Diego, Sleep Clinical Postdoctoral Fellowship
  • Doctorate in Clinical Neuropsychology, American School of Professional Psychology
  • 10 Years Directing Insomnia Program at University of Chicago
  • Author of Putting Sleep Problems to Bed

Fun Sleep Facts About Dr. Medalie
Optimal sleep: 11:00 PM – 8:00 AM
Peak alertness: 10:00 AM – 2:00 PM
Favorite sleep tip: Alarm training: Pick a new alarm sound and do practice sessions 2/day where you practice rapidly rising from bed to the new sound.

Brittney Jones, PsyD


Dr. Brittney Jones earned a Doctor of Psychology degree in Clinical Psychology from Mercer University in Atlanta, GA. Before fulfilling her doctorate, she obtained two master’s degrees in clinical health psychology and clinical mental health counseling from Mercer University. 

Dr. Jones attended Harvard Medical School at Cambridge Health Alliance where she completed her psychology residency in Cambridge, MA. Following her residency, she was accepted into Stanford University School of Medicine’s postdoctoral fellowship in Palo Alto, CA where she is currently a fellow. 

Dr. Jones has extensive clinical experiences with children, teens, and adults. She specializes in pain, chronic illness, trauma, and mood and anxiety disorders. At DrLullaby, Dr. Jones compassionately helps to optimize sleep, tailoring research-backed strategies to each person’s sleep needs. 

Fun Sleep Facts About Dr. Jones:

Optimal sleep: 9:00 PM -6:00 
Peak alertness: 9:00 AM – 12:00 PM
Favorite sleep tip: Did you know the way you think about sleep can affect sleep quality? When you notice anxiety, worry, or hopelessness about sleep, this is a cue that there may be unhelpful thoughts that may interfere with sleep. Here at DrLullaby, we help to optimize and decrease stress related to sleep!