Leg pain/locking up knee?

I cant bend my leg that much with out serious pain. is my knee cap broken?

• I was riding my 4wheeler and i was coming around a nice curve and the bike was seeming to tip over so i jumped off of it and tried to land with only one leg. . that didn't work but jumping off while a bike is tipping isn't easy but i did and landing on one leg. as soon as i landed my knew started hurting and i feel to the ground as my leg got week . but i got up i could walk but it was with a limp but at the time i was able to walk . and as time went on the pain got worst cant bend my leg my knee cap seems to be fine but its under and beside my knee cap is where its hurting i cant twist my knee or leg in any way bend or nothing is it broke or bruised . please help. i know i need to go to a doctor but i cant afford it at the moment .

• Answer:

  Well good news is your kneecap is probably not broken, I've cracked my kneecap in half twice and broken off a piece of my femur (the thigh bone) along with it. To me, it sounds like you have a bad sprain, considering that you could walk on it. I'm no doctor though and you should definitely get it checked out as soon as possible or it could get worse and you could hurt yourself more.