Boyfriend Scared of Pregnancy

Long post I’m sorry:

My boyfriend and I have been dating for little over a year and we currently live together. Initially we used condoms but when we became official and monogamous we decided to stop (his idea). Up until about a month ago we exclusively used the withdrawal method along with me monitoring my cycle (CM, the whole thing). Then one day my BF became really paranoid about getting me pregnant which is weird because we’ve never had a single scare. He now insists we use condoms and that I get on some form of birth control. His reasoning is that BC, specifically IUDs are more effective than condoms. He also says he doesn’t want to use condoms because they don’t feel as good. I had my reservations about BC and IUDs for health reasons and have been taking my time with my decision. Since then my BF has pretty much stopped sleeping with me and refuses to do it even with a condom+withdrawal. He says he’s worried I’ll get pregnant even with these two forms and doesn’t really want to have sex until I get BC. I’ve explained to him how effective condoms and withdrawal is but he won’t budge. At this point it feels like he’s purposely withholding sex to force me into getting on BC sooner. It’s his right not to have sex with me of course but what am I supposed to do in the meantime? Help.

Edit: There were no pregnancies that happened in his friend group or his family or mine. But I do remember being 5 days “late” 3 months ago. I put it in quotations because my cycle has always been long so being 5 to 8 days late is my normal. In the last 3 years, I’ve probably had 7~ “normal” length cycles. But he knows this, we’ve talked about it 100 times so I don’t know if it’s that.