Hi, I'm currently experiencing pains (5days now), around my upper left chest and left shoulder blade. I don't feel pain while just walking or sitting. I can even run 2 miles with no issues. However, when I move a particular way, I feel a slight pain within my chest. If I press down on one area, it feels bruised. When I cough or breath in very deep, I also feel pain in my chest. Please give advice. Thank you!