I have severe sleep apnea. Using CPAP probably literally saved my life. I was beginning to think I had narcolepsy, because I would often fall asleep against my will or every intention, just if I sat down in the afternoon. I was afraid that I would fall asleep at stop lights because I was so tired and tempted to close my eyes while waiting.
Ive probably had it since I was in my 20s, but I thought I just liked to sleep in. I was skinny then, but Im not now. In any case, if you can treat it with cpap, even if you are overweight, you may find you feel so much better after treatment that it becomes easier to lose weight.
I also bought my machine straight from cpap.com, for about 400. I buy my replacment mask cushions on ebay, and it costs me about 60$ a year. I have a nose covering mask, and have also learned to sleep with my mouth shut. It took me only a week or so to get used to it, and now I find it very relaxing and fall asleep almost immediately with it.
I have had a couple of colds, and find sometimes the cpap pressure actually makes it easier to sleep. sometimes I take a decongestant a little before going to bed and then use my neti pot to clear everything out and go to sleep right after (if I have a cold, that is) I also like to use the humidifier, it helps, otherwise I tend to get a little stuffy and dehydrated.
My insurance completely covered my sleep study-it was considered a lab test and my coverage includes that fully. However, they wanted to charge me 2500 for a machine and my deductible was 3500. So that is why I bought one myself for 400. A year later, I happened to need surgery on my leg and met my deductible so I went ahead and got fitted by them for a machine which I didnt have to pay for and I have an extra for back up.
I cannot overstate how much it changed my life. I feel so much better, like a new person. like a magic pill. I felt so terrible those last couple of years and I just could not figure out why. Probably having children who I co-slept with for the last 10 years and breastfed during the night made me get even less sleep or less deep sleep than previously. But even after I got the cpap I still had a nursling in bed with me and I had no issues waking for him and still getting a great night sleep and feeling great the next day.
It may in fact be due to excess weight, maybe not. But if you can start treatment, I advise doing so and not waiting.