Thanks ladies,
I think i am on the rigth track.
Ive been taking 2000 mg of fish oil since the beginning. I've also been taking 1800mg glucosamine with 800 mg chondroitin... the chondroitin did make a difference to simple glucosamine on its own. I also take calcium with a tiny amount of Vit D.
I will try the idea of Krill Oil and see what happens. One change at a time :) Otherwise keeping moving is really the best solution... but this is hard at night! Im glad I can keep up my swimming routine. Some times I jog... but only after a bit of brisk walking to lubricate the joints. Thanks for support. I'll keep you posted about the progress.