Ten years ago my right knee was bone-on-bone painful, and then I had it replaced. Fantastically successful! Now, my left knee has the same kind of pain, although not quite as intense as the right knee was, so I don't supppose they will agree to replace it just yet.
From having my right knee x-rayed and then seeing the consultant it took more than six months before I had the operation. I dread to think how long the wait will be this time, when I eventually get onto the waiting list.
I do find that losing a bit of weight helps, as does going to a keep fit class once a week and keeping mobile. Good luck celebgran, the pain really is horrible isn't it. Using a walking stick helps a little, although I must admit I hate it and only use one on really bad days.
I take codeine, by the way, as I am allergic to paracetamol and ibuprofen.
But I only take it when absolutely necessary. I get it on prescription.