hi Brandon,
I think pretty much anything is possible with nerves. There are some cutaneous nerves coming off the femoral that supply that area. I guess whether your pain is deep or superficial might tell you something as far as where to look. There are good diagrams online of cutaneous and deeper nerves for the posterior thigh. Maybe some lidocaine cream to the area to calm it down? Did your other pains after the nerve block get any better?
Littlepaw