8 Weeks Ago, I Had a Gum Graft Done and Still Have No Feeling in my Lip or Chin?

I've recently discovered the graft was done near the mental nerve. The Dr. said he severed a few of the branches of the mental nerve, but everything should be OK and not to worry. I'm in pain when I talk, move my lower lip and eat. There is a tugging and pulling feeling inside my lip anytime I try to move it, accompanied by pain, tingling and electrical pulses. I would appreciate any kind of advice, and recommendations as to what can be done to repair this injury..