TT, you need to realize it might take some time to get used to the CPAP and sleep through the night with. They call it being compliant. The pressure (somewhere between 4-18 generally) you will need depends on your test results and if it is a higher than 10 or 12 you may take a while to get used to it. When i first went on CPAP i was at 16 (the machines only went to 18) and it was very hard to get used to the pressure blowing in my nose and out my mouth. I use nasal pillow type masks since at that pressure the other types wouldn't stay sealed and being a mouth breather caused torrents of air to come out of my mouth while using the CPAP. I used a neoprene strap to keep my mouth shut till i slept with my mouth closed naturally. The masks have come a long way since i started using them around 1998. THIS IS NOT meant to be discouraging but to let you know if you have problems it is normal. I sleep so much better with my CPAP and i'm 100% compliant, but it took me a while before i stopped taking it off in the middle of the night. I feel myself relax when i put the mask on and still end up sleeping on my stomach a lot of the time.