You may indeed have traumatized a nerve. The area that you hit is near the area of the femoral nerve which supplies the quadriceps muscle and the skin on the anterior thigh and MEDIAL part of the leg. If you have loss of skin sensation on the OUTER aspect of the leg, this is atypical for a femoral nerve problem, and there may be a pinched nerve elsewhere
The injury did not seem to be so severe, but nerves heal slowly and it may be several weeks or months before maximum recovery. A good test at predicting the chance/rate of recovery is a needle electromyography study and femoral nerve motor conduction study that can be performed by your local neurologist.
Good luck