Help itching on back of neck! LICE??

About a week ago I took a shower with a new shampoo and conditioner (sheamoisure) and afterwards the back of my neck has been itching every day. It doesn't itch all the time but at least 3 time a day it's really itchy. This has been going on for 6 days, I think the redness is because of how hard I've scratched back there. Can anyone help??? What is this?
EDIT: I think this could be lice?? I took an alcohol swab and rubbed around the area and then 2 min later my scalp stared itching like crazy. Made me think it could be lice?????