I've having chest pain since . I think I may have pulled a muscle. The pain is constant, although laying a certain way helps. I am slightly concerned and am mainly looking for reassurance that it's not an MI. I have no other symptoms, but to be proactive, I took an aspirin when I went to bed and another just now (6 hrs. later). I don't recall having this pain ever before. I suspect I may have pulled a muscle or eaten too much for dinner (although I have gerd & it's not like that). Any comments? I am a 64 year old woman, overweight, but no family history of heart disease. I see my doctor regularly.