Wierd thing. I have been doing very well, getting stronger with minimal swelling , icing and elevating, doing my PT exercises but really taking it easy. Anyway today, my knee puffed up and got very painful and I really can't figure out why. I did one set of PT exercises, about 4 minutes on the bike and a 15 minute outing. I did sleep on my side for quite a while last night with a pillow tween my knees. I've always been a side sleeper so this has been really hard. So maybe I twisted it or something. It is really more swollen than its been for a while. Does this kind of thing just happen? Any ideas? I'm not worried, I just wish to avoid the activity that set it off. I'll tell you one thing, I don't think I'm going to resume my schedule this week: French class, marimba, meditation group, getting a haircut soon (!). It's easy to feel pretty successful laying up on the couch and around the house but I can't stand for more than 10-15 minutes and I don't think I could sit for more than 45 minutes. So I've had a set back, even while being a model patient! Any thoughts are appreciated.