Life and trauma

Since school started this year I have realised due to my trauma I now flinch at any sudden loud noises including music… My last class for the day is technology and when the class gets loud he raises his voice saying “Hey” and every time I flinch and each time he does that I get more closer to having a panic attack. Same with my science class, my peers get really loud and my teacher tries to calm them down but it never works so he ends up yelling which is ever so fantastic-It’s hasn’t been two months since school has been in for me and I’m already scared, and mentally exhausted-