I have had this problem all my life and its really annoying.
I have never done a natural burp (maybe when i was a baby but not in the past 15 years at least)
Even when i have eaten a huge meal or have been drinking fizzy drinks i just don't burp and it really does my head in because i end up feeling really bloated and espically when im drinking alcho pops or beers because all the gas builds up in my stomach and makes me feel really bloated and gassy which makes me feel sick.
And no i don't let it out the other end either! Instead of burping i get these weird gurlgles come up in my throat and sometimes its really embarasing because they can be quite loud, i have noticed i get the gurgles really bad after i have been smoking weed aswell?! Don't really know how its all connected?
Does anyone else have thsi problem? Know any ways of making myself burp??! lol