someone pls help me to survive my ableist family

so reciently i been feeling more overhelmed. i had to socialise with more ppl, stay in overstimaling spaces and i just had to torelate things that trigger me.

and as a respond to all this, i been having verbal shutdowns. but since i only have a diagnosis of sensory hipersensibility  and not the necesary autims diagnosis that i NEED i dont have the accomodations to comunnicate while this shutdowns so i been forcing me to talk, and that feels like a TORTURE. 

i tried to talk to my parents about it but they keep refusing to give me that accomodations, they say that since i never showed this type of behavior before (behavior that i clearly masked all my life) the thing that is happening to me is only on my mind.

i been doing a lot of research about autims and i identify with some things that i researched (sensory issues, lack of empathy, special interest, difficulty with my emotions and more) and i totally need some accomodations.

so if someone have tips for my situation PLEASE give. i cant take this anymore.