Typically, heart attacks and acid reflux have very different symptoms. People just freak when they get pains anywhere between their neck and bellybutton.
If it's a sharp pain (poking, acute, whatever), it's highly unlikely that it's related to your heart. If you heart is hurtin', most people describe it as a "crushing" pain--like an elephant sitting on your chest. And yes, there are the RARE occasions where someone presents with a toothache as their only initial symptom. Maybe it was just their time?
So if you're freezing, short-of-breath, tired, radiating pain on the left side, please go the hospital. If your heart has already stopped, you probably have about 6mins before a carrot is smarter than you.
If your tummy hurts, take a tums.
Anyway, if you want good information, do a google search for "heart attack symptom" and pick out the most reliable source. Certainly don't trust anyone here! 😉