Have you tried anything to make the pain easier for you until you can get it sorted out on the NHS ? I have been referred by my doctor for a new knee. ( waiting list on NHS crazy) so I done loads of research and am now three weeks into pain free, the first step is that I had a cortizone jab into the knee , two weeks later I had a jab of Ostenil Plus into my knee at my local private health centre, the cortisone helped very much in taking swelling down and easing pain, Ostenil Plus jab takes two weeks to kick in so early days for that still, Worth reading up on. My cortizone jab was £195 and Ostenil £295. I intend to keep my knee as long as possible so if this becomes a yearly thing then so be it. £10 per week to be pain free a small price to pay compared to £15t for a new knee which let's face it does not come with a guarantee that it won't hurt or need replacing again in the future. Hope this helps.