So you're now about 19-20 weeks post-op, yes? If so that is still pretty much early days! My sister had both her knees done and is now 18 months on one and 12 months on the other. She is only now beginning to get some resolution of that characteristic burning pain and swelling. Ice-packs and painkillers are still a regular part of her routine. But she is very mobile and now noting her improvement daily.
Everyone has a different experiences as you can tell from a quick browse though here. I think you sound like you are doing very well and must not try to rush things. You had a major op and the body doesn't bounce back just like you had a tooth out! Do rest lots and use those ice-packs all the time. Activity, yes, but rest also. They must be at the very least in equal amounts, only changing as you feel you are able.
And yes, I am in the UK which makes it very interesting when I'm trying to talk with you folk from the US as there is such a lot of different protocols there. I mean, I was amazed when I heard that you all have to choose your own prostheses! Over here the patient's are rarely even told that there are different prostheses to begin with!! Vive la differance, eh?
United Kingdom
