i am a 45 year old man, 6'2 210 pounds. over the past couple months i have been having back pain in the middle of my back. i have been to a chiropracter 3 times but don't get any relief. for the past few days I have been having some tightness in my chest, a little to the right side, minor shortness of breath. I consider myself pretty fit and active. 4 years ago I got to feeling bad and I thought I may be having heart problems ( have GERD) and went to the ER but they said no, just GERD flaring up. I had a treadmill stress test to verify that diagnosis. I dont have any family history available. Am I worrying to much?