Are you a mouth breather. If so you will need a full face mask. I tried many and the best one is the Resmed Airfit 20. It is light and gets a good seal. You can sleep on the side with it or on your back. I was using the Quatro Mirage mask but it was heavy and uncomfortable and if you sleep on the side and the mask moves it will leak and if you are on a automatic machine, the pressure will rev up quickly and give you more pressure than what you need because it sensing you need more pressure. This will wake you up.. I did not know this and thought my CPAP was defective and I purchased the top of the line Resmed Aircurve Auto 10 which is both a bipap/cpap and paid $1700 and only used 4 hours and now no use for it and collecting dust. I still use the Resmed Autosense 10 which is a great machine. The numbers you gave appears that you need a CPAP and not a BIPAP. A BIPAP gives two types of pressure and it may be disrupting your sleep. You need to speak with a CPAP tech or go through other forums. I had the anxiety you had and slept no more than 2 to 3 hours per night for weeks.I had to stop work for 3 months. You can't stop the therapy or your going to get high blood pressure, cause heart damage, get cramps and feel bad every day. I know because I stop using it and almost went to the hospital on a couple occasion. My pulmonary doctor told me to work out 3 hours before I go to bed. Go to the Gym and work out, or work out at home. Get that TV insanity video. Take Melotonin and take a warm shower. If you like Milk, drink warm milk. You got to figure out how long it takes to doze off and then set the ramp for that time. Set the pressure from 4 to 11 on Auto mode. Get a heated hose if the air is too cold. Adjust the temperature to your liking. Make sure you track your results on Sleepy head software you download from your memory card on your machine and check what your average pressure is and then you can adjust the machine accordingly. The key is getting the right mask and don't put it on too tight but tight enough where it will not leak. If you are not a mouth breather than get a nose pillow mask. After a while you will get use to it and you will eventually sleep 5 to 6 hours a sleep. Even sleeping with it for 4 hours per day will make a big difference in how you feel. If the cause of sleep apnea is due to weight, lose the weight but slowly. I went from an all meat diet to a Vegetarian/Vegan diet with occasional baked fish. I lost 50 lbs. I took RNA (Ribo nucleac Acid) which I was told will help with your Apnea. If you loose the weight, you will see your AHI and Hypopnea go down and once diminish you can get off machine. I know because I am almost there. Good Luck
