Is there a chance I could be pregnant?

Hello!

I’m a tad paranoid because tonight I was giving my boyfriend a hand job and he ejaculated very very near the opening of my vagina, I could tell it got on the opening but he did not penetrate me at all. I immediately wiped it off with toilet paper and a wet wipe but I wasn’t sure if that was the correct thing to do. I am paranoid that sperm could have gotten up there, however I’m taking birth control and I’m hoping that even if there was a chance sperm could have gotten inside me, It wouldn’t be likely for me to be pregnant. Can someone please answer if there is a chance I could be pregnant?

Thank you!