I am having pain in my upper front, left side, by my armpit, on my chestbone . The pain is constant but it gets worse when I cough or sneeze, like a stabbing pain. I ve had this pain for 3 days now. The pain started 2 days after I slipped and fell flat on the floor with my stomach hitting the ground. Fortunately, the floor was carpeted. May I know what is causing this pain? Please advise. Thank you very much....Sonny Reyes, YYYY@YYYY