In basketball practice I made a cut and felt a sharp pain in my right knee. After that, running and jumping has caused much pain in my knee. I went to an athletic trainer and they told me I had tendinitis and to ice and take ibuprofen. It continues to be very painful during practice. I can feel rubbing and clicking in my knee when I walk. What is wrong with my knee? Should I still be playing basketball or will it make it worse?