I and my wife both have sleep apnia.
When I was in the hospital for my bi-pass the nurses told me I needed to get tested. Before I got tested I was back in the hospital for an infection. The nurses kept waking me up all night telling me to breath. I would stop breathing and set off the alarms due to my oxygen level going too low. I finally got tested and after two hours I felt like I was never going to go to sleep. I got up, the testing nurse came in, and I told her I just could not get to sleep. She informed me that I was falling off to sleep every five minutes, but I kept waking myself up when I quite breathing, or started snoring. I was given a C-Pap, love my C-Pap. I wake up refreshed and ready to face the day. By using my C-Pap solid for two years, I retrained my body so to speak. Now if I don't use it for a week or so, no problem. I won't snore or stop breathing. But only for a week or so, then I will start if I don't go back on the C-Pap.
Now for the darling little lady. For such a tiny little person, she can wake the dead. But the thing that bothered me was that she quite breathing for several seconds, every third or forth snore. She went and got tested. They gave her a C-Pap and told her that she was one of the worst they had ever tested. She brought it home and used it for a night or two, then she said it was too much and has refused to wear it since. Our son will close our bedroom door, his bedroom door, and turn on his stereo to drown his Mom out. I will take it for a while then I will wake her up and tell her to turn over. Sometimes it works, sometimes it does not. Once or twice a week I will actually make her go to the couch down stairs, or the spare bedroom. One night she is going to stop breathing and not start up again. I point this out, but her only comment is, "Get off my back, I'm not wearing it, get over it". She says it makes her gag, and she does not like the mask on her face.