I had acid reflux at night. I was mowing the lawn one day when my heart starting beating like a freight train. I thought I was having the big one. I went to the hospital and they did a EGD (upper endo) found out I had a bleeding ulcer, Barretts, chronic gastritis, H Pylori. My hemaglobin was down to 7, that's why my heart was pounding trying to pump blood. They fixed my ulcer and put me on a PPi and a low acid diet. I now eat a healthy low acid diet. Stay away from smoked meats and salt. You might have silent acid reflux.