I probably have obstructive sleep apnea. I exhibit a symptoms (ie feeling sleepy despite getting normal or above average amounts of sleep, dry mouth when I wake up) and also I just had a sleep specialist tell me that the geometry of my mouth and sinuses makes puts me at high risk. I got an appointment for a sleep study a month from now. Based on what I've read, this means that it will probably take at least two months or more before I can start using a CPAP machine if I go through the standard procedure. This seems like an insane amount of time to wait for something that probably has a good chance of significantly improving my quality of life immediately. Is there any good reason why I can't just buy a CPAP machine and start using it?