I'm only two months post-op but sometimes I don't have much noise but other times, I have very loud noises coming from my abdomen area. Also, I do sometimes feel nauseous but that's something I just assume is part of the whole process of having a j-pouch. I just drink plenty of water and try and occupy myself until I'm feeling better.
8 times out of 10, when I am feeling nauseous, it's because I need to burp. Standing up and walking around gets things moving and eventually the wind does come up and makes me feel a lot better.