Im just over 10 weeks, and my extension got a little better each week, except week 4 when I got a little more swelling. I was worried too, but I was told I was doing fine. The last time I was officially measured at week 7 I was at 2-that was my last PT, but my extension is flat now, so I would guess 0. You had problems falling on your knee, I had problems with a DVT, but I think our numbers sound fine!!