Hello, I have had that chest tightness also; it was benign for many years, but it has become quite intense. I have hiatal hernia and GERD. My GI does not think it's related to these two conditions. My old PCP said that it was a "conspiracy of muscular-skeletal and digestive problems." My condition gets worse when I am seated, of hunched, so there may be some truth to what he said. BTW: the GI recommended IBGard for me, but she did not know that mint is really bad for GERD and IBGard or its equivalent has mint. Please be mindful of that, too. Wishing you well.