Should I be this upset?

In school yesterday (I’m a freshmen) I was walking to my eighth period and this boy kept tugging on the back of my hair.

I kept telling him to stop but he continued to do it. After four or five times I promptly turned around and warned him that I would kick him in ‘the nutsack’ if he continues.

Well he did it again and I went to knee him, he covered himself and sneered at me

“I’d like to see you try”

And he kept doing it all the way down to my eighth period (gym)

When I got to the locker rooms I called my mom and started crying about the whole situation. She assured me she’d take care of it and that she’ll see me at home.

I also told the gym teachers and sat out of gym because I couldn’t calm down from the situation.

My gym teacher told me that I wasn’t over reacting because no one likes to be dominated or feel like they have no power. I’m not sure why I cried so hard but I think it just shook something in me.

Is it wrong of me to be this upset? Is this classified as harassment ? I know he didn’t do anything like touch my boobs or grip my hips but I still told him to stop, and he was still touching my body. Was it wrong of me to report him? Should I have just let it go?