Over the years I've had several dilatations to widen areas of scar tissue in my esophagus and I have experienced that same side effect. I have realized that eating small amounts of food more often, "grazing' has helped me. As for coffee, I have had to finally give it up, but before I did, I found that Taster's Choice instant coffee was the only one I could tolerate with the acid giving me instant reflux. Sadly, even that simply isn't worth the acid, which just hastens the damage and the need for another dilatation. For holidays or meals out with friends, I usually drink an ensure or similar meal replacement and take just a taste or 2 of whatever is served without having hunger pangs. The bright side is that the belching did dissipate over the years, but I hope you find a life strategy that works for you.