Look at a thread in this forum entitled:
IRREGULAR HEARTBEAT AND REFLUX
for a couple of descriptions of symptoms.
Can you describe your symptoms?
These symptoms can be quite different from person to person. Look at a couple of threads about "reflux" or "reflux esophagitis" for descriptions of some symptom groups.
There can be a range of ways to describe them depending upon the person. Some say they feel vague 'flutters' in the middle of the chest. Others seem to feel a tight band wrapped around their chests. Some people experience pain that resembles a heart attack, up the chest, into the jaw and the shoulder/arm.