Hello. I've just joined. I had my knee replacement 14 weeks ago. I had a lot of pain for five days and then none at all. I was walking unaided at 17 days. I could easily straighten and bend my leg. I was soon walking a mile a day with no pain. After 2 months I noticed a clicking noise and a twanging on the outside of my knee but still no pain. For the last 2 weeks I have been walking a mile in the morning and one and a half miles in the afternoon. I felt great. 2 days ago a got a sharp pain at the clicking area and I find the stairs agony and walking quite painful. So upset and worried. What has happened and what should I do.