Hi, Since yesterday, I have been having a sharp pain in the right side of my chest that comes on quickly and doesn t last very long. The same side of my back hurts too. I have been lifting weights and do quite a few so I am wondering if maybe I pulled something. My chest bones are sore, as is my back on my muscle area.The pain is sharp but doesn t last very long. Does that sound like muscle strain or something else possibly? Thanks!