I have a hiatal hernia and severe reflux---It seems to make me burp more than I ever used to. Can't tell you how many times I have gottenin to bed and just after I lie down---I have to sit up so I can burp------I quite often end up sleeping in my recliner.
Hi, there r a number of things that could be going on and going to ur Dr for a full check up would be the wisest thing to do at this point.
This could be a ulcer, GERD, hiatal hernia, Gall Bladder....so unless and until u go to the Dr it is just speculation.
Look to ur family's medical history....as many times u can find answers or help in finding answers there,
Good luck and do post an update.