Am 16 and i was playing a hockey match in school last year when i wss in 3rd year am in 5th nkw i skipped 4th. The opposing team's player tried to get the ball but got my foot instead and yanked her hockey stick back. I screamed as my knee just sorta went to the other side and i fell. I don't know whsts going on but I've got it checked up but my gp said theres nothing wrong and its just my weight taking over it and i got an xray but it didn't show anythong but if it was my weight why didn't ut happen before and hsd to happen after the accident. Everytime i run my knee keeps doing the same thing and i don't know what to do because it happened today and it hurts a lot my knees all swollen but apparently the xray and my gp think its nothing Do yoi knpw what might have happened?