Not sure if I broke my kneecap?

I asked my dad your question because he has broken his kneecap before, and he said that your knee is definitely not broken from what you have put. He says that he thinks that it is badly bruised, and I think you should go to the doctor and see what they say, but other than that, you can be assured that your knee is not broken because you wouldn't be able to stand on it or put any weight on it. I would suggest keeping it straight for as long at possible to allow it to heal properly.