When they did my sleep study is was planned as a "split night" study, where the 1st half was to identify the apnea, the 2nd have to find the mask and settings that worked well for me. The 1st night, I didn't hit REM until the last 2 hours and that is when I showed the severe apnea, preventing both REM and deep wave (for muscle regeration). I had to go back for the study with the masks and to determine the best settings. That's when they found that I couldn't handle CPAP and needed the BI PAP.

If they didn't do yours as a split, you might want to request another round so they can be sure you are set up with what you really need. Some people can handle CPAP, but for me I woke up immediately when the tech set the levels evenly - felt as though I was being suffocated and I couldn't breath out at all. Now that I have the Bi-Pap, I can barely sleep without it. It made such a difference in my strength and how the muscles felt when I was able to get the deep wave sleep!

Good luck. You definetly need to get on something, but if they haven't tried CPAP on you it may do no good if you're like I was.