Have you tried wearing a chin strap?  It helps to keep you breathing through your nose. 
BG

You will be well rested after you begin using your cpap. It meant that I was not needing to doze while reading a newspaper or my new book. I did not feel like sleeping when I needed to drive. I did not need a mid afternoon nap on my one day off. I could get to the end of a video that I rented.
Good luck on your surgery.
I also want to tell you that as your weight drops, should you feel like you are constantly belching when you put the cpap on at night you could be getting excess air. I had lost 120 pounds and began belching, waking up with severe gas, and feeling like I had too much air pumped in me. My settings were high as I had 102 incidences per hour. I am down to 23. I believe my family history predisposes me to sleep apnea. My sister and mom and great grandmother were all sleep deprived.
So, keep this in mind, as you lose you will have to have your cpap recalibrated.


Linda

We all struggle with not being able to just get in bed and sleep without worrying abou****er level in the humidifier, and noise if we move. I had a severe problem as I gained weight. My bi level pressure was seventeen in and eleven out. It sounded like a dust buster if I moved at night. Yet, if it was secure it was just a mild sound.
I went through nose pillow stage...where the air just goes up your nose,  and five different full nose masks, all promised to be better for me... How many times can you complain about your mask, I wondered. Were you unable to sleep in a nice comfortable bed while children were sleeping in doorways all over the world?
I had so much air flow on my eyes when I was tested for glaucoma I had to have eye drops. My eyes were too dry. I told my doctor it was the constant air flow from my bipap machine.
Now, I say I use my cpap machine as a crutch. I stay up far too late some nights. I get full rest though when I do sleep thanks to that darn cpap machine. I still wake up with marks on my face. I was promised that this new mask would work even with loose straps and not put air on my face. It doesn't seem to work for me.

Linda

Carvan...Thank you for the suggestions. I was told because I was a mouth breath I needed to wear the full mask. I will have to check more options out.

I'll have to ask for the sleeping meds.

I'd really like to get the benefits of the machine.

Thanks James I am really hoping you are right.

Ceelions