Hi B06, Welcome to heaing well forum. There could be several things going on just to just to give you an idea. One could be acid reflux, you mention it is happening when you finish swallowing a drink (especially if it is fizzy) and often times acid reflux is mixed up with heart problems. The second could be anxiety but often times this presents with shortness of breath and dizziness too. You most certianly want to get to the doctor and get checked out. Please do post again and let us know how it goes...good luck