Heys!
Your story sounds somewhat similar to mine. I had a TTT, lateral release, and ligament work. I started PT about 3 weeks after the surgery, was non weight bearing for (ever!) about 6 weeks, and was in a brace for about 4 months. When I was finally allowed out of the brace I started to be more active and then everything went down hill. I started bruising and swelling, and now it has gotten to the point that my knee is completely swollen and bruises when I bend it. My dr. says it gets angry. I've had 7 MRIs, x-rays, was put back in a brace, and now they don't understand what is going on (besides telling me it's angry and something isn't right, but they can't figure it out.) Sometimes they think it is a nerve issue, they thought it was a metal allergy so he took out the screws, and now he is just guessing that it may be the sutures he used to fix the ligament.... So I am not the greatest help for you, but thought I would share that we are kinda experiencing the same issue.