Is this technically trauma??

I'm scared of people screaming at me cause my mom does that
I've also learned how to not cry and just tolerate the pain when i'm being hit by the back scratcher or the belt because she'd get mad at me even more if i cried so now to not cry i just pinch myself really hard or bite myself really hard, of course i'm making sure i don't bleed
But its strong enough to leave a mark
My parents don't pay attention tho