I have been experiencing flittering in my left upper chest region, followed by burping or feeling the need to burp and having pain there as well. I have seen a heart doctor , had EKG s ran, wore a heart monitor, had an ultrasound of my heart done and nothing was found to be wrong. Yet I still have these symptoms. I am 46 years old, am considered extremely over weight, have high blood pressure and hypothyroidism. I do take medications for the high blood pressure and hypothyroidism.