I have pain behind the knee and pain from the hip to the knee. I ve had an ultrasound that showed no blood clot, and an xray that shows a lot of arthritis in the knee. The pain has gotten to the point that I m having trouble sleeping at night because I cannot find a comfortable position. It is hard to stand for any length of time and I hurt when I go from a sitting to standing position. Over the counter meds are not really helping. Do I need to see an orthopedist?