What we call heartburn can be serious and can be your body telling you of other things to come. I had heart burn used Nexium and other things and it helped. Changed diet and it helped. I am a power/distance walker and have been for 30 years. One night I woke up with real bad heartburn and then pain down my right arm. Well the short story is after a trip to the Cat lab. and a couple of stents heartburn subsided. So what I am saying is to make sure your symptoms, ie: heartburn are not masking some other issue. Yes I took all of the test, from stress test etc. even an ekg 3 wks. before and passed with flying colors. The docs are not always right. Take care.