What should I do?

I needed to rant about something that happened today while we went out.

My mum, aunt and I went to a local seaside place with some fairground rides, but I knew I was a little vulnerable, so I told them I didn't want to go the day prior, only for them to tell me I was "ruining everyone's day," so I went reluctantly.

This seaside place was SO busy! I tap my fingers when I get anxious and wear earplugs, (to which they laughed at me) but I am always very aware that my difficulty responding would cause an unwanted reaction in others. I speak low, so was asked to repeat or to clarify everything when I spoke, which made me anxious. My mum and aunt expressed displeasure, people were walking right into me and the whole thing ended with me becoming very shut down, to which my family said I was, "in a very bad mood" and I just overheard my mum say that "it ruins everyone's good day when he is like that"... about a day trip I didn't want to take.