I Had A Major Fall About Three Weeks Ago While

I had a major fall about three weeks ago while playing a basketball game. The girl behind me was trying to cut in front of me and accidentally pushed me from behind. I landed on my right knee, and it was a giant blue and red bruise for a week and a half. It still really hurts to touch it, and I definitely can't kneel down. I felt around my knee to see where it hurt most, and I think that there's a small dent in my knee where I landed. Please help, I am very worried! Thank you.