Broken Leg question!?

OK. so aproximately 7 weeks ago, i broke my leg iceskating. tib fib fracture(spiral tib, shattered fib). No surgery because im 13.I was in the orginial long leg cast from the ER up until last monday. my doctor sent me to this dude to get a fracture brace for my leg. he told me i would get the measurments done on my unaffected leg and that he dosnt want my cast off yet because he dosnt want to disturb the alignent.so i go to the guy, he takes off the cast with the misunderstood permision of my doctor, traumatized me. he bent my knee 90 degrees after being stuck straight for so long. i was through the roof! worst pain of my life, worse than when i broke it. ugh it was so bad. so now i have trust issues. then , he put my old cast back on me by taping over it. so i went home hysterically crying with a herman monster cast. then i went to the dr, they gave me a new long leg cast. i got pain that night in my heel , and turns out i got a stage 1 pressure ulcer. then i got that cast off, got another LLC , and here i am. Im very scared of getting that pain again. i have terrible trust issues now, as i dont know who to believe , if there gonna hurt me, etc.its been such an emotional roller coaster and its horrible.im afraid of physical therapy because i dont want that pain or any pain of that sort, but i know i have to. i want it to be over. i think i may be out of this cast next week or during winter break ....how am i supposed to walk out of the office with my knee stuck and if its bent ill be in terible pain...but i like wanna get out of this cast but im scared S***less honestly...please please help me with any advice!im a wreck!