Oh, that's really sad to hear. I have obstructive sleep apnea, and my doctor suggested using an auto-CPAP. I have been using it for almost two years, and I have had no problems like nose pain or infection. Instead, I get a restful night's sleep. The Auto CPAP really saved my life. If I stop using it, I feel terrible when I wake up and have a dry mouth and a very sore throat, and also, my snoring interferes with my wife's sleep. I think your mask straps are too tight, or you bought a small-size mask. If it's not the real problem, try using auto CPAP. It's more comfortable than regular CPAP.
I have sleep apnea and I can't sleep without a CPAP machine.
It's not easy to get used to a CPAP machine.