I had my surgery a little over a year ago, and I still get gassy, and I do believe a lot of it has to do with how much air you take in when you're eating. I just try to eat slowly and not gulp my food (or drink) down. I've also noticed that when I eat yogurt or drink milk, I get gassy. I've been wondering too if my stomach has changed now that it's smaller and no longer tolerates lactose as well as it used to, but I read a bit about lactose intolereance online and I don't think what I experience is severe enough to make me concerned about having developed the intolerance. If you do think your gas is severe enough, you should definitely ask your doctor the next time you see him/her, though I think, if anything, it could just be your stomach adjusting to the changes and food you're re-introducing to it.