Skeptical But Optimistic - Manhattan, NY

I had my procedure done 4 days ago. During the procedure, there was one time I felt a sharp needle poking the nerve of my scalp. I actually jumped a little because I did not expected that sharp pain. On the second day, I felt numbness to the back side of my right scalp. Each time I touch my right forhead, I would feel tenderness to the right side of my scalp. You mentioned that the forehead nerves transmit sensation from the scalp. Is this normal? Will it go away? Was there any nerve damage caused by this procedure? I am really concerned. Please advise.