Maybe get a second opinion on the treatment.
My sister had the worst sleep apnea they had ever seen when they did her study.
she smokes HEAVILY, she's overweight, she has insulin resistant diabetes
They woke her up after she was asleep for less than 30 min and stopped breathing like 8 times! and the last time she wasn't waking up very quick at all.
She has the decongestant (nasal spray) and oxygen (it's an airpump with a mask) and then the air is sort of forced into your nose.
I used to know a lady who worked at the company who makes the pump or apnea machine - and she told me about them and I realized how bad my sister was.
They said I saved her life basically when I made her go to the doc.
Anyhow - if you want to get drastic, they can do something with the back of your throat but seriously - if you can handle the mask - that's the way to go.