I was working in my back yard about 2 or 3 weeks ago and i dont remember hitting my knee but i must have cuz it started hurting the next day and has only gotten worse. At first it hurt only when i was sqwatting down and tried to get up ( only when i put pressure on it) now its more than doubled in size and i cant get up from a sitting posistion without help, i cant kneel, i cant bend it very far and i cant sit on my knees all. What is wrong with it and what do i do? thanks - shannon