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This is Dr. David
sleep is a very complex issue
many issues can affect sleep, medications, psychological issues, sleep hygeine, being overweight can cause sleep apnea.
your diet and exercise regimen, caffeine use can all affect sleep
it sounds like your doctors are treating you with Belsomra.
I would expect you have had a full sleep evaluation from a sleep specialist doctor and had a sleep study already?
boy, that shows you have severe anxiety and worry symptoms.
you will not die from insomnia.
you should talk to your doctor about treatments for bad anxiety symptoms.