You must be so healthy from eating all the fresh veggies and fruit - I am thinking of changing my diet.
I had pain in the joints of my right hand and then my left knee started acting up. I Googled to see if there was anything I could do (apart from taking pain killers)
You might try cutting out nightshades, as well. They are inflammatory for folks with arthritis. I'm not sure what your situation is but it may be worth a try to see if it helps.
The Truth About Nightshades and Arthritis - Living With Arthritis