I still haven't started using a CPAP machine, as I have developed other coping methods (sleeping on one side helps dramatically). I have considered doing another sleep study though, to get some more information and start with a CPAP machine for backup.
Then you go back to your doctor, discuss your need for a CPAP or APAP machine right now, and possible longer-term treatments.
Depending on insurance specifics, it may be much cheaper to buy a CPAP from an online source than via a full-service insurance-covered medical equipment company. Saving 50-75% is not unusual.
I was diagnosed with sleep apnea at around 20, which is rare for a young, healthy person. In my case I think it's just genetic because my dad has it. But I figured out something was wrong because I would sleep 10-12 hours and still wake up feeling exhausted. I wore the CPAP machine for a few years and that helped, but now I don't think I need it anymore. I sleep about 7 hours without it and feel fine.
She told me to take a sock, put a tennis ball in it, safety pin it to the back of a t-shirt, and sleep in that.
But a lot of times you'll get scheduled for a clinic anyway...
After about a month, I merely felt normal, averaging about 7 hours of sleep a night.