I had a sleep study done and was diagnosed with moderate obstructive sleep apnea a couple of weeks ago. I stopped breathing an average of 29 times per hour. I would stop breathing for up to 22 seconds each time. During the course of the evening my heart rate went from 55bpm at the beginning to 115bpm just before waking. This is what's been causing the exhaustion; my body wasn't resting.

I went and picked up my cpap machine yesterday. I look like an alien face sucker is attached to me when I wear the apparatus. I woke up a few times during the night and took it off several times but I managed to keep it on for most of the night. It's going to take a bit of getting used to and some adjustments but there's light at the end of the tunnel. For the first time in what seems like forever, I don't feel exhausted. I don't feel like crawling right back into bed and sleeping a few more hours. Granted, I don't feel "awake" but this is a very promising start.