Autism

So my husbands little brother has Autism, and so do atleast two of his little cousions on his mums side. I already have a daughter with my husband and so far no signs of Autism. I am currently 28 weeks pregnant with our boy and I just cant shake this fear of him having autism aswell. I feel horrible for even thinking it, ofcourse I will love him regardless, I just know our journey would be a bit harder beacuse of it.

I feel like because my husband didnt get it and his brother did, that its likely because it skipped my daughter that theres more of a chance this baby will get it.

Anyone have any experiences with this?