question: I have a fluttery sensation in the center of my chest usually after I eat.  I have been diagnosed with GERD and I am taking medication for that.  It almost feels like something is moving in my chest area. Sometimes there is a slight tightening. Lately, it has been a continuous feeling.  It is not painful, but I am worried about what it is.  I have a family history of heart problems.  I have had a stress test and it came back negative.