I have being have muscle pain in my chest, shoulder blades and left upper arm. The pain in all areas comes and goes. Two days ago, when it first began, the pain was severe enough that I had to stop what I was doing until it went away. The pain feels like the soreness you experience after doing a physical activity when you haven't done any physical active in some time. I have not had any severe pain since two days ago. That is no the case with me. Note that I have asthma. Do you know what may be wrong with me?