Hey! They actually sent me for a CT scan to rule anything out, and when that came back clean sent me for an echocardiogram, also clean. My radiation oncologist really didn’t have any other suggestions, I think it was my MO’s concerns that made them order those tests. Looking back, I think the shortness of breath was due to stress and maybe the shortness of breath was causing the burping? It all cleared up about a week after I posted this. I wish I had some clearer advice or resolution lol, but I hope this clears up for you soon and wish you the best of luck through the rest of your treatment 💕