Thursday night I fell off the bed onto tile, with all my force on my knees, and my right knee hurts extremely bad, and it hurts to go up and down stairs, to even bend it to walk at this point. i can do it, but starting the process of bending hurts, so i push to get through it, whats the worse than can be wrong with my knee? There's kind of a hard lump under my kneecap, and its tender to the touch and im icing it, but i want to know what could be wrong and who do i need to go see? If you could help that'd be great! Thanks!