Johnc, So sorry to hear of your troubles with the knee. I had a bilateral tkr four and a half months ago and all seems to be going okay. I don't have pain or much swelling, never did, but when I do too much. I have been sewing and find when I stand in one spot cutting out it makes my legs sore and then I get a stiffness that comes, I think, from a touch of swelling. Haven't let it stand in my way though, been going strong. I really do believe it takes a lot longer for us to fully heal than we realize, and that we often expect too much. Not your case, however, sounds like you have a much more serious situation going on. I am sure I join the others when I say you will be in my prayers and I will be sending good thoughts your way in hopes you get good news. Please, let us know the results of the blood work and what is going on. Good luck and best wishes. Rowdy