I have had a similar experience... My started in my right hip and then went so the knee and then to the calf and finally spread everywhere on the right leg (including toes). After I thought it couldnt get any worse it spread to the left leg. There is always a possiblity that the hip pain could be unrelated but it is always better to be safe than sorry. I would keep a detailed journal of the pain and make an appointment to see your doctor to discuss this new symptom.