I was ran over by a car the tire ran over the side if my left knee I went to my Dr. And she took x-rays and told me nothing was broken. A week later I have so much pain walking, moveing, bending my knee. My knee cap look like it moved over to alittle and its still so puffy and swallon I have a numbness at the top of my knee and under the skin I feel pain. When I walk my knee locks up or I feel it move around im a little worried and would like to know whats going on with my knee and if its serious???