Hmmm, internet medical advice . . . probably as shaky as gettng your tuning specs off a Dutch forum. ( my Sport wouldn't be running without this forum).
It would be helpful for me to know the location of your fracture, whether diagnosed by plain film or CT scan and if displaced or multiple. PM me on that stuff, eh?
Nonetheless, fractures tend to heal nicely in 5- 10 weeks. Yet, if there has been enough force to fracure , there has certainly been enough force to sprain and strain.
Sprains are injuries to the ligaments , especially those forming joints holding bone to bone. The greatest area of concern for you would be injury to the sacroiliac joints and the junction of the base of the spine with the pelvis.
The good news is there is a lot that can be done to rehabilitate injured ligaments. The bad news is that it is a long haul. 40-50% of ligament (joint) healing occurs within 6 months. The remainder takes from 1 - 3 years.
What you do to restore function over these months to years will make a world of difference.