A bi-pap is different from a C-pap machine. I'm not sure how exactly as I forgot.

I have sleep apnea, was diagnosed in 2002 I think. I have been using a C-pap ever since. I can sleep on my back and on my sides if my mask is on just right. There are lots of different masks you can wear.

I never slept on my stomach and I don't think that would be easy with a machine like these.

Have you had a sleep study yet? You will need one in order to be officially diagnosed and then given a bi-pap or a c-pap machine.

Good luck with everything,
Weebs37