Hi Sharon, this is interesting. Last year, my mom had an endoscopy, after that she had chest pain, it's almost in the middle of two breasts. I was worried so I called her doctor, actually I also called my boyfriend who is a cardiologist, her doctor said it's not because of the endoscopy, my boyfriend said it might be sprain of muscle. Anyway, she had the pain right after the endoscopy, and the pain lasted for a week to go. I still think it's caused by the endoscopy, even no doctor admits so.