I feel weird and I’m not sure why

So I️ had sex with this guy. We had had sex before once. It was weird because like he didn’t really talk the whole time. So he came over again and this time I️ assumed it was for sex, which I️ was cool with. So I’m on my stomach and he’s gonna hit it from behind. And I️ hear the condom open and he asked if I️ was on birth control so I️ said yes. And then we had sex and then he kinda just stopped and was like can I️ use the restroom. So he went and I️ looked and the condom was sitting on the window sill opened but still rolled up. And so then I️ realized he asked me if I️ was on birth control because he didn’t want to use a condom. I️ wasn’t really sure if we were done having sex and he came back and it seemed like we were done. So I️ went to the bathroom and I️ realized he came in me. And idk now I️ just feel weird and I’m not exactly sure why. It’s not like I️ didn’t have condomless sex with my ex. But now I️ feel icky and I️ don’t know why really. Has this happened to anyone else? How did you feel?