Sleep studies are no fun. That said, it doesn't hurt, and the worst that can happen is you don't get a good night's sleep. But if you are going in for a study, it sounds like you already know what that feels like.
Make sure to let them know if you aren't comfortable. If possible, get the wake up time relaxed. To me, it was the most senseless part of the testing: take someone who has trouble sleeping, is probably anxious about testing, and then give them a hard stop to get out of bed in the morning.
Best wishes to you.
Thanks Sleeprider and Dwlims for the advice.
Is it possible to have OSA when you don't gasp for breath? Or if you only gasp every now and then? I think that my snoring is the major issue and it doesn't matter how I sleep, whether I sleep on my side or on my back. Thanks again for all the feedback.
Dwlims, it sounds like I may have to do a HST versus an in lab study. But still want to have it done so that I can rule out OSA if that is not a problem for me.