I was tying my shoes yesterday morning and when I stood up I felt a knot in my back that radiated through my body to my upper stomach area. When I take a deep breath, that area of my back hurts, in fact I get a really sharp pain. I was concerned that this could be heart related, so I went to the doctor. He said that my risk factors for a heart attack were low and told me to go home and take tylenol and if it worsens, go to the hospital. Also, one other thing, prior to this happening, I had been experiencing an uncomfortable feeling just under my breast bone, like indigestion.
Could this really be a muscle knotting up in my back? Would something like this cause me pain when I take deep breaths?