Habit of eating and laying down.. pain in chest for month. started taking acid reflux meds 2 days ago helps a little, still there is this heart attack?

Reflux pain: This is reflux pain and not a heart attack. You've identified one major factor; lying down immediately after eating. Other lifestyle factors include smoking, obesity, and certain foods like fatty or fried food, tomato sauce, chocolate and garlic. Alcohol is a risk as well. Given the response to antacids, you may want to try an over-the-counter medication like Zantac (ranitidine) or Axid.