Three months ago I injured my shin when I slipped while boarding a bus. It seemed to be just a surface injury but only now does it seem to be healing . At the beginning it was extremely painful when I would first put my weight on it in the morning or after I had been sitting down. There was a lot of swelling around the injury and around the ankles but that has now reduced a lot. I was treated for an infection with antibiotics . However, I have now noticed that I am getting cramps in that leg, especially in bed. Should I be worried?