HELP! Please chime if your sleep apnea took a while to resolve

I noticed pretty shortly after my RNY that I was waking up in the morning with extreme dry mouth.  I did not have this problem before surgery.  I've yet to determine if it was my new mask or the weight loss (both happened in the same time period).  At 3 months post-op, I had a new sleep study.  They dropped my pressure just slightly, but I am still on the machine.

I have lost about 60-70 pounds more since then and I'm thinking I'm due for another sleep study.  I have dry mouth BAD every morning.  Plus, the thing has started blowing in my eardrums again.  Bleh.  I want rid of that machine so bad...