I wonder if you're having the same thing I did, especially when I took Reglan and for several months after it.

I got heart palpitations (premature atrial contractions PACs), but often I also got what I call "stomach flutters". It was like a nervous tingling at my stomach level. Often happened with the PACs, but sometimes they simply interchanged.

The PACs are apparently definitely related to gastroparesis (which I have), but possibly also to GERD I wonder. This all seems to do with the vagus nerve, the main driver of the autonomic nervous system which goes down the esophagus and controls the digestive system as well as the heart.

I'm thinking my stomach flutters are just another way of my faulty vagus nerve acting out.