Hi Emma,
My surgery was similar to yours. However, I was limited to a maximum of 90 degrees for five weeks post-surgery. When the swelling goes down, everything gets easier. (For me, after week three I had minimal pain.) The day after I removed the brace, my therapist had me use a stability ball to roll the leg out and back, using a band to help with the bending part. I went from 102 to 118 the first day. I hope you feel better.
Eileen