I have a psychological condition that makes me non-verbal, and have some sensory issues. (23f)

I had an appointment this morning at it was so traumatic. There was a miscommunication and he was not informed that I am non-verbal and got annoyed at me not answering his questions before exam, however when the assistant came in the room she informed him.

He then lay me back for the exam and I had some issues with the feeling and was squirming a bit and trying to push his hand and he just kept saying "could you just stay still in a really rude tone".
The assistant left the room for a couple minutes and he said some horrible things about me, I have a feeling he thought maybe non-verbal meant I was deaf. Including insulting my teeth.
The insults included:
"how can a full grown adult be so immature"
and calling my teeth "grotty" and "filled with cavities"

At the end he said to the assistant "make she is booked with a different dentist next time, I can't deal with these disabled types".