Baby daddy ghosted me...HELP

I’m recently divorced, I’ve been dating casually. I dated a guy for a couple of weeks, and I happen to find out I’m pregnant this week. He doesn’t know yet. I know for sure it is his. I’ve tried to contact him repeatedly and he won’t answer.I don’t really think he’s going to want to be in the babies life but I feel like he has a right to know, and my baby deserves for him to know. What should I do? I know where he lives, but I don’t want to just seem crazy and show up at his house like a weirdo!