Is this because I’m autistic?

First post, I was diagnosed a few years ago at 23.

I was wondering if anybody went through something such as accidentally seeing something extremely disturbing, and not be able to stop it looping in your head for the rest of the day. Hyper-fixating on it.

Would this correlate with being autistic or something else? It’s just very exhausting, leaves me feeling like a different person temporarily or like I’m trying to leave my body.