Im Stressed out

Im autistic and im having a really hard time at school. Socially, im fine but in the classroom im not. Some days im flying, some days im lying in my bed crying. My classmates are annoying and cant keep quiet for five secs and some of my teachers are quite scary and get cross easily. I have PTSD from my parents arguing and fighting when i was younger and a rude principal in my primary school who picked on me and several other students so loud and raised voices give me flashbacks. School is somewhere i dont wanna be. Im great academically but i feel like im drowning in a sea of 67 and Chicken Star brainrotted kids who act out.