Sucking it off, still pregnancy?

My bf couldn't contain himself. We messed around and we both made it clear we didn't have a condom with us. I said it's a bad idea to try it because he just came but I sucked it off. He then just stuck the tip in 😒. If I sucked it all off there probably is still a chance I could get pregnant right ? I swear omg I'm going on birth control soon and I'm going to freak if I get pregnant. We can't afford to take care of a child.. 🙄😠