Ratchety joints

Hi , I started having a lot of trouble with my joints recently particularly on my right side.  It started with a swollen ankle, and general stiffness and 'ratcheting' in my joints. I had a bad fall and don't know if that  had anything to do sign it  but my knee started to swell up.    The swelling is not so bad now but the pain in my knee is dreadful when I put any weight on it despite being on 8 tramadol a day!  Consequently I am in a wheelchair most of the time nowcry.  No-one seems to know what's caused it.  

Anyone have similar symptoms?