am I crazy for wanting another baby? autism

hello, so I always envisioned myself having 3 kids. I had a traumatic first birth that almost resulted in medical malpractice and my first born a girl was later diagnosed with autism. she is 2. I then had a boy <1yr> that is neurotypical and the sweetest baby. I want a 3rd as I always envisioned that when I was married. I am not getting any younger but I am scared of the possibility of autism happening again but I want my children to have each other as they grow up. I know for me I always wanted another sibling as I only had one and he was born when I was already older.

I am just so scared of autism occurring again. it doesnt seem to be on either side of our family.