Bf wants to try anal

I recently found out I’m pregnant and I told my bf if I got pregnant we’d do anal. I didn’t think it was going to happen so soon and now he wants to do anal. I’m not into the idea because I don’t want it to hurt and feel uncomfortable. Is it wrong I don’t want to do anal? And Ik if I tell him I don’t want to he’ll be upset. I was stalling when telling him we’d do anal if I ended up pregnant because I just didn’t feel comfortable doing it.