I hate overstimulation

So idk about ya'll but I get really overstimulated by sounds. and when I say i get overstimulated i don't mean that they make me uncomfortable, I mean they make my shoulders tense up, i start to hyperventilate, My eyes start to water and i start to cry, and i noticed that i tend to glare at the person making the sounds. 

One thing I hate about it is that it's made just existing in life so awful and I dread going to school because of it. Some of my triggers are gum chewing, repetitive noises, snoring, someone just breathing too loud, mouth sounds, and one specific one is that my bedroom is right above the kitchen and I can hear my parents talking and walking downstairs right under me and it sucks. And I can't address it to the person because it sounds rude. Like I can't just ask someone to breathe quieter or spit their gum out because it's overstimulating me. 

Another thing that gets me is whenever I'm trying to go to sleep, I have super thin walls. My parents always watch tv after i go to bed and even though it's on low volume i can still hear it and it overstimulates me and i start crying. Then when i go ask them to turn it down they yell at me for it so i can never tell when i'm overstimulated and it sucks.

And I've tried noise cancelling headphones but they never block out all of the sound. When I'm overstimulated, I need either complete silence or I just blast my music in my headphones because when I can't handle the uncontrollable noises, The ones I can control I can handle. But I can't do that during the school day so I have to just tough it out because I can't wear headphones during the school day so I plug my ears but then I can't do my work because my hands aren't free.

My parents won't do anything to help me either. They've known i've been like this since I was little and get mad at me if i bring it up and won't do anything to help me. I don't know what to do. My boyfriend has been really great about it and doing his best but theirs only so much he can do. I just dread school and being home all the time and idk what to do. 

One more thing that also sucks is when it happens in class and I'm bawling my eyes out from the sound so I leave. My teacher will go with me into the hallway and ask what happens and I explain to them, they look at me like I just said the most confusing and absurd thing. Last time it happened, someone was chewing gum and it overstimulated me so bad I had to go into the hallway and I was crying and hyperventilating and when I explained to the teacher he just looked at me weird and said "ok". Then he tried to "relate" in a way and say "Oh I get annoyed sometimes when this one student I have will randomly say meow every once in a while". I get he's trying to help but it's not quite the same... 

I feel like everyone I try to explain it to either just doesn't get it or tries to relate in a way or be like "oh I hate mouth noises too but I don't cry or anything like that, its not THAT bad." yeah it might not be that bad for you but it is for me and it fucking sucks. 

just sometimes I wish I could mute the world.