No doctor worth listening to will say anything beyond what you can find with a quick google in a forum like this anyway.
I will second what was mentioned above, sleep apnea will make you feel awful sleeping on your back, almost like your tongue is swollen or falling down your throat.
Tolookah@discuss.tchncs.de 5 days ago
The trip though will get you a cpap potentially, and those after helpful if you do have apnea.
If you have apnea and you see a doctor, you’ll sleep better with the CPAP, give it a week or two though.