Is Movement Of Knee Advisable While Wearing Braces?

Hello. I have a tibial plateau fracture from riding an atv and it tilted and braces my leg. This Happened on the 15th of May 2016 in Saint Marteen while I was on vacation. I went to the doctor and they did a ct scan and an X-ray. They gave me a full leg cast, hard back and soft front. They told me I had to do surgery as soon as I got back to the US on the 18th. I rest my leg for the remaining time. When I came back to the US I went straight to the er. I ended up staying overnight for a blood transfusion *not because of trauma*. I m anemic and iron deficient(low hemoglobin 5. Something) On the 20th of May they removed the cast and put on a splint. I was not supposed to remove it at all. I haven t seen a orthopedic as yet, I was schedule to see him on the 25th of May 2016. When I saw him, he removed the splint and gave me a knee brace where I was told I can bend my knee 90 degrees, nwb, toe touch, and can also sleep with it opened. He said I didn t require surgery but I could do it if i wanted, the difference was with surgery it was faster healing/weight bearing time. I declined. I currently use crutches to move around because I was told not to always be in bed, or bear weight. My brace should/ is only removed to take a shower. I would like to know if it is normal not to feel any pain from about the 3day after I broke it until now? Is that a sign that it is healing? Is it ok for me to have my knee in the brace 90 degrees max* bending and moving it*? Is sitting with my foot bottom on the ground weight bearing? I had to push my appointment back due to problems with my insurance.