Never give someone a wedgie on New Years Eve!!!

On New Years eve I broke my ankle, my notes called it a trimalleolar fracture with a talus shift and i needed surgery (ORIF Open reduction Internal fixation).
It's been almost 7 weeks since I broke my ankle and the cast was removed yesterday.
My doctor told me everything's healing nicely & to just start walking on it and only use the crutches when i feel i need to.
I can put weight on it, but I've tried to walk and the pain is unreal. Is this normal?
Do you have any exercises that could help me improve the mobility in my ankle & foot?
Thanks