Do I have the right to be mad?

So I had sex with a guy not too long ago. I'm not on birth control but we decided that he would just pull out. I know that's not smart but it's what we decided to do. He knew I wasnt on birth control and that he needed to pull out, and I thought he did. Fast forward to today I stay home from work bc np cramps are absolutely unbearable and I tell him why I stayed home. He goes "I'm high key happy you started your period bc I came in you s little and I was scared." To which I replied "You didnt think that was something you should of told me?"

I totally understand that this is also my fault for not using protection. I'm not placing blame on anyone for anything. I'm just asking if I have the right to be mad that hr came in my knowing I was on birth control and didnt tell me til he found out I started my period