Had a diffuse stiffness in sternum. ecg and exercise tolerance test came negative. was given antacid. for a few times had palpitations after heavy meals. have anxiety how to proceed. ?

Treat anxiety.: If you have a little anxiety then having palpitations can be extremely disconcerting. Palpitations in this setting are most likely nothing to worry about. The anxiety though can make everything more significant and worrisome. I would recommend going back to see your physician and talk about treating the underlying anxiety. That would be the best way to go.