After under going 3 sepparte sleep studies my Doctor was concerned because I have 0% in the stage that replimishes your body. I basically stay in dream state waking easily. I'm small boned, and I don't have a big neck. I'm only 5'4" and 132 lbs. but I stop breathing every 4 min he said. I constantly wake up with or without my cpap machine, ripping my mask off in my sleep because of dry mouth. throat, and a overall discomfort from the mask. I get very little sleep and noticed it is really starting to effect my memory, concentration, mood, and of course I feel exhausted most of the time. I have tried every mask they make with no success. I don't understand what it is that keeps me from entering deep sleep, but I would love to sleep through a whole night without awaking a dozen times. Does anyone else have this problem? I don't remember when the last time I felt really rested was.