Re: Constant dull pain/ heaviness chest...help
It could be a digestive problem. If antacids relieve it, it probably is digestive.
Or it could be some kind of muscle issue. You can stretch the pectoral muscles by standing in a doorway, putting your elbow and forearm against the doorframe, and stepping through until you feel a light stretch.
Or it could be there's something else going on. But if it's lasted this long, you should probably get it checked out.