What Causes Numbness In Leg After An Injury?

i am a 20 year old female. 2.5 months ago, i fell and got a severe bone bruise on my shin. It swelled up instantly and went numb almost immediately. I went to the doctor where i got x-rays done and she said that it would heal on its own and there was no fracture. the numbing was probably swollen tissue and it too would fix itself. however, 2.5 months later, it's still numb. is this normal?