I had no idea, but had similar symptoms as you. The CPAP is a life changer. There only way I knew I was waking up at night was my Apple Watch, and then my psychiatrist suggested the sleep study. And here we are.

I have been struggling with it for 15 years or more and as weird as it is at first, the positive air pressure machines really, really really help. The biggest trick is to get used to it, but, I recommend the full mouth and nose mask since that makes it easier to stay on through the night. I remember the second night I used it, had it all adjusted finally with the settings where it worked and I slept like a rock. Follow your doctor's orders and use the machine and you will feel better!