I had a fall 6 weeks ago ,just under my knee was hit hard against the ground , diagnosed with Traumatic Arthritis and bursitis , swelling gone down now , but sudden darts of pain up and down the leg especially in bed at night ! Should I be wearing a support still during the day , should I be doing ex cerise like walking , what will help to heal this problem , it is very tender still , I have rested it a lot over the 6 weeks ! How long will it take to heal ?