I have dull pain in my left chest area, from the bottom of my breast all the way up and over down my back to under my shoulder blade and a some of my left shoulder. I ve had this pain before but not for a few months, but it seems worse this time. From what I ve researched it doesn t seem like a heart attack to me but what ele could cause this? I ve been exercising lately so I first thought maybe from that, but then I remembered when I had this pain before , I had not been exercising at all. Thank you.