For the past 4 years my left side of my chest has had a constant pain

Not sure what you can do but continue to advocate for your own health.  What I mean is often times GERD is a diagnosis for something in that general area when there is no other answer, so continue to get them looking for more answers and do more testing.  What other specialty doctors have you seen; gastroenterologist, cardiologist, etc?  You may even want to consider a nutritionist and a dietician.  Hope this helps

I keep getting pain in both size of my chest I have ready other peoples they have the same think pkease can explain tome what it is please

I went to emergency room 4:30am had test done they told me guard ha.follow up with ur Dr. Get an angiogram done rule out blockage.I went first to have echo cardio done.two hours later told me had lack of oxygen to outer heart wall.I went then to cardiologist they did a standard ekg and told me he was going to call an ambulance to take me to the hospital from his office I laughed an said I drove here my wife is a nurse and she can drive me.well two blockages 1@90%and the other off the widow maker@95%double bypass later I got lucky.go follow up