Chances are good that your pain will end in due course. TKR is such a major surgery, with so much disruption of your bone and soft tissues, that it's inevitably painful. Some people can put full weight on their new knees right away (still painful, but they can do it) and others find the pain too great to put much weight on the knee at all. I remember that for me I could put weight on the knee, but it hurt like crazy; it took a few months before my new knees were not painful to simply stand upon. I have no pain at all now.
You'll be seeing your surgeon again in a few weeks? I think I remember you saying that. It's quite possible your knee will feel better by then.
Two months is still early days. Give your knee lots of opportunity to heal: plenty of rest, elevating (to reduce swelling), icing (same, plus it helps reduce pain), and just gentle exercise. It can seem like that's "not doing enough" but it's just what a new knee needs.