So, by reading your post this Thurs will be 4 wks post op, correct? I don't think there is anything wrong except two things. 1) you have a worn out knee &..... 2) your Dr did a lot of work on your knee during your scope.
I had 2 scopes done on my lt knee before having my TKR 6/19/07. The first time I had a miniscus tear & my knee needed cleaned up inside from arthritis. I was off work 6 wks & was on crutches the first 3 wks. I walk all day long in my full time job & had to come back with no restrictions. The second scope was 8 months later by another orthopedic Dr & I was off work 8 wks, on crutches 1 wk. This time he said he had a whole lot of work cleaning up all the arthritis. Telling me there was no part of my knee that was not totally damaged by the arthritis.
It is very true....the swelling, the pain, the lack of mobility, and the time needed off from work all depends on how much work the surgeon does in surgery. I know it's hard waiting it out, but you are fortunate that you can return to work in the condition your in & get a full pay check. I'm off work at least 3 months with 60 % pay....and I'm sinking FAST, but I had no choice in the matter. I'm not ready to roll over & play dead at 46 yet....although after this some days I feel like it...LOL
Be patient, it will all come together for you