Do I have to tell people I have autism in my life?

1 year of highschool i was working at this convenience store
there was a woman in her 60s working there as well.

one day she was telling me she thought the store manager had autism
because he would forget the days she needed off.

i told her i had autism but i don't tell people many people.
she said i should when i said i don't think its any ones business she give me a weird look & said ok its your life.

i have told some people at my last job & they were mean to me. i
dont think i'm going to tell people anyone about it screw them.

Do I have to tell people I have autism in my life?
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