Lice…….?

ok, my mother got lice from where she was working and me and my sister got it. My mom was lucky enough to get rid of it after a few days and my sister got rid of it a few days ago. I still had it, but I used the shampoo and it really seemed to work. EVERY live lice died. And most eggs came out. Then a nurse picked out a few remaining eggs. This morning sprayed alot of hairspray in my hair, held my hair under water for a long time hoping to drown them, and then today I dyed my hair too. I had been wanting to dye it and I was hoping that the dye would kill some.
We searched through my hair and there is no sight of them.
But around 1 hour ago my head started itching again. Could the itch be all in my head, could there possibly be something I missed, or after a lice bites you can you have a reaction where you still itch for a while? What?

Question posted courtesy of: Head Lice Treatment