Hello jdad2018. I have exactly the same issues. Chest pain or better discmfort either below the left nipple or mid chest heaviness or some discomfort on upper left back. It comes every day from 9am untill night sleep. Mornig is ok. That feeling make me dizzy and afraid for fainting. Afraid to drive, go out, travel, etc and the way of leaving became horrible. I have done all cardiac (multiple EKGs, blood tests many times, stress test with nuclear, holter, CT angiogram, echo) and came back normal. Also I had all gastro (endoscopy, fluroscpy, colonoscpy) and are also normal. Further a couple of CTs on chest including almost all organs came back good. However, the feeling of discomfort has been dereriorated ( I have it more than a year). Also I notice that while at gym (almost daily running 3km) I feel no problem. But after few hours start again. I have some relief by placing capsicum pluster under left armpit close to chest, please update me for your case.