Hip Contusion/Cracked Pelvis

Hi, I fell through my grandmother's attic on March 18th. My doctor thought she saw a crack on my pelvis, but we decided against a cat scan to confirm it, since the treatment is the same. I am still mostly unable to move my leg. It's as if the strength is totally gone. I'm sure it's the shock of landing on my side from a 12-foot fall. I used to do pilates and I would like to start doing some of those exercises to prevent muscle atrophy, but I am still in a lot of pain from the bone trauma. Are there any lighter exercises I could do that won't irritate the pelvis but can work my thigh muscles?
Also, how long should I expect this recovery to take? I was asked to take a work trip to Washington DC in three weeks, and I'm not sure if I should cancel. Thanks.