Ok, so last week I hit my knee against a gymnastics horse, ya stupid I know, i'm really clumsy. Anyway the next day it was pretty bruised then a few days after I woke up and stood up and then pain was so bad I just fell over. It's been pretty painful the past few days, getting worse whenever I bend it, like when i'm standing up it's like shooting pain in the back of my knee and also the front at the top. My Mum says it's a bit swollen too. What should I do? What could be wrong with it? It's been like this for a few days now, and i've been wearing knee support which doesn't really help. Thank you in advance.