mis diagnosed question regarding meltdowns and people

Hi

All my lilfe when I have had frustration or overwhelm i hit myself and bite myself.

I did not realise this was related to autism until recently in the last few years.

I got tested in 2015 but because I have substance misuse issues and was on pregabalin when tested, I was tested as negative.

Also, I rock back and forth and this was missed by both myself and my relative who filled out the questionnaire.

My question is, what happens if someone like me cannot get their own space, will my meltdowns get worse?

Many thanks