I have acid reflux and from my experience you can get chest pains all over like that. Usually with acid reflux you can get heartburn and gas, which go hand in hand with acid reflux. When you do get some antacids and if the pain subsides, especially if you burp a lot or pass gas, after you take one, then you'll know what the problem is. Because real heart issues don't stop giving you problems after you've taken antacids. Another clue is if the pain/heartburn starts up not too long after you eat.