What to do?

I went on a date with a guy I had been talking to for a while, we had sex, long story short, I had to get a plan B. After sex he left immediately, then later on said he didn't want to talk to me anymore because I'm a "hoe" (I assume he got what he wanted, and was no longer interested). It's been a few weeks since, and I have not talked to him, and didn't plan to considering the horrible things he had said... well I think I'm pregnant now, but waiting to test till after my missed period. Should I tell him now that it's a possibility, or should I wait until I know for sure? What do I even say to him??