Burping
I had the same issue. For a couple of weeks after surgery I had to really focus on my swallowing in order to cut down on the amount of air that went along with the food or drinks. Every once in a while, no matter how careful I was, I had to bring up a big ole belch to relieve the pressure. It was almost like pre-vomiting, a really awful gagging sound! Now, at seven weeks out, I rarely have to burp. So if my experience is anything to go by, yes, it gets much better!
One thing: I followed the "sip, sip, sip" mantra, and I'm convinced that caused a lot of my problems. Instead of sipping I started just taking normal but smaller swallows, and it worked much better for me. You may find some improvement with that as well.
Good luck! I remember how bad it felt, wondering if I was ever going to be able to leave my house without worrying if I would have to "BRRRAAAAAAAPP!" in front of people!
Surgery: RNY on 12/18/2013 with Jay M. Snow, MD "Don't mistake my kindness for weakness." - Robert Herjavec, quoting Al Capone
I can't really say if it's common or not, to be honest. All I can do is relate my own experience. As to why it happens, it was explained to me that when you have a regular big stomach, swallowing a little bit of air is no big deal. However, when you only have a teensy pouch, that little bit of air takes up a relatively large amount of room in the pouch, and it leads to a burp because of the pressure.
Surgery: RNY on 12/18/2013 with Jay M. Snow, MD "Don't mistake my kindness for weakness." - Robert Herjavec, quoting Al Capone
No, I never drink carbonated drinks. Never was a big soda drinker before surgery, so I'm not missing that at all now, although I do miss the bottle of champagne my husbeast and I would open occasionally. I just had to become very conscious of how I was swallowing for a while. I learned that eating too fast will increase the amount of air you swallow, as will talking while eating, both sins of mine. So now I slow down, don't talk, and when I drink I take in a swallow and consciously breathe out before I swallow it down. I'm not sure that really plays any part, honestly, but it seems to help me, maybe just because it slows me down a little.
Surgery: RNY on 12/18/2013 with Jay M. Snow, MD "Don't mistake my kindness for weakness." - Robert Herjavec, quoting Al Capone