hello, my son and i are in tie quan do, and after a kick to the left side of my upper chest i have had extreme pain for the past two days, hurts when i breath or lift my arm, or shirt my body, i do not beleive that it is a fracture, but i am scared that it may be something more serious. could there be something wrong with my heart or lungs? please let me know soon. Thank you, Trish