I'm not sure this is the information you are looking for but there is a book by Arthur Cocoa M.D. called The Pulse Test. This physician says that food sensitivities cause an increased heart rate after ingestion of the offending item. I remembered this book when you said the palpitations come after eating... Your descript
ion doesn't sound like the esophageal spasms I have but there is no question that everyone is different and has different manifestations of these things. I wish I could offer you more helpful advice. Hope you find some answers soon and start feeling better.