Odd symptom question

Ni

I'm 14 weeks and for the last hour I've had a slight throbbing sensation on my scalp. It's not a headache my scalp is sore to touch it's like the feeling you get when you have your hair tied up too tight for a long time! I only wear my hair down or low loose pony tail, has any one else experienced this I'm not even sure if it's pregnancy related but I've never felt it like this before