I'm only 11 days out from TKR and I know that feeling. I have gone to PT 3 times thus far and it really is helpful. You MUST do exercises for that knee. Did they show you any to do? Some I do are heel slides, leg lifts, gentle squats, etc. I would go on-line if you aren't going to PT and find some beginning exercises. There are some out there with good pictures. Good luck.