At track practice when i did ny first 200 meter run I felt perfectly fine. Then it all changed when i did my 400 meter dash. Suddenly i felt a sharp papin in my upper left rib. I couldnt even breath. At first i had no idea. then i thought it was gas but i have been farting for the past 3 days and there was no result. i ahve been laying on my left side for the past three days trying to trun to my right and work out the harsh pain that i get when im on that side to see if it goes away. but it just hurt really bad. Every night i hope to wake up on my right side and see if it is gone. It would really help if someone could tell me whats wrong and how to fix it anything would help.

 PLEASE HELP ME!