Well, I promised I'd get back to you helpful people, after my x-ray. I'm still in pain, still icing, still elevating, but . . . the x-ray showed all is well with the implant. The diagnosis I got was simply 'overuse' - apparently, even 10 months out, it was too soon to be carrying heavy boxes up and down three flights of stairs and being on my feet up to 18 hours every day.
"Overuse' is all I got out of him, but it was music to my ears. He knows with the move, that telling me to get off my feet cannot be honored, but I've promised to slow down a bit and give myself a chance to recover. Tylenol and icing have been advised and he gave me a Rx for Tramadol for the times when I just have to push on.
Thank you again for creating this message board, for the wise medical guesses (can't call it advice, right?) the excellent moderation, and the hand holding that takes place here every day. This place should be required reading for every TKR patient.