I wouldn't be so sure. My mate had a fracture in his leg during September playing rugby, which he thought was just bruising. He continued to play on it until January, where it just began to hurt too much to play. So off to the doctor's he went, who told him the fracture had occurred and healed itself during the time, but because of the pressure he had put on it (walking, running etc) it had fused really smeggily. He was in a cast for 2 months to correct a healed broken bone :XD: So yeah, go to a doctor/hospital just to be safe.