hi, ive been having this discomfort on my left chest, upper part of my breast...it comes and go.. and when I have it, it worries me that it might get worse. I have problem with reflux, but this still concerns me that this is something to do with my heart.. ive been to the emergency department about 2 weeks ago when I have pain right in the lower part of my ribs, I had ecg, and a blood test was carried out to make sure I had no heart attack. Can this be a problem with the arteries? I am also waiting for results of ph monitoring and manometry...please help..thank you..