I have pain in my chest and both of my arm I've been to the ER 7 times and they say it's not heart related but my PCp said I have GERD can it be that?

Sure. Sure. However make sure your chest X-ray and blood work was normal. Test for H Pylori. If all the tests a negative. Take a 6 to 12 wk course of proton pump inhibitor to let your stomach/esophagus heal and see if you feel better. .