Should i be walking on my ankle brace with a fractured fibula?

Depends: On where on the fibula the fracture is and if displaced or not. Consult with your orthopedist.

Ask your doctor: Some fibula fractures are stable and are unaffected by weight bearing. Others are at risk for displacement if walked on.

Cast / fracture boot: Fractures usually need to be better immobilized. You may need a cast or a fracture boot. Consult a physician.