I am 19 years old and am fairly active. Tonight I have been having some painful chest pains right below my sternum when I breathe deeper than a really shallow breath. It feels almost like a stabbing sensation like what you would get if you got a cramp while running after awhile.
I run at least 3 times a week, and the PT workout today was an extremely rigorous hour long cardio workout. I have been a smoker for a little over 3 years now and just recently three days ago got the breathe knocked out of me when someone slammed me to the ground really hard with his shoulder into my chest during a 'friendly' MMA match.
I was wondering if anyone had any ideas of what it might be and I apologize ahead of time for the vague symptoms.