how do i tell an ex hookup i’m pregnant? do i even tell him?

we had sex twice during a week about a month ago (i know this is irrelevant but he was the bomb lol)

so i’m not far along or anything, it’s just how tf would i tell him?

i guess i’m just scared about if he doesn’t want it, cos i grew up with an abusive dad until we left, and now thats always going to be a gap in his spot. i don’t want my kid to feel like they’re unwanted, which is always going to be a thought of theirs since i’m young and it was a hookup.