it is very strange

I have been experiencing excessive burping, it is very strange that I can start to burp voluntarily to relieve trapped wind. But it seems like I can continue burping indefinitely and I  could never do this before. Sometimes I have pain on right side of my back. I also have apnea and I use the CPAP machine. I’m going to make an appointment with a gastroenterologist, since I’m considering revision soon.

I greatly appreciate any information you could offer.