I think he came in me! Help 🙃

So when me and my partner were having sex, he pulled out and came on the external part of my vagina I believe, and some got on my shirt. I’m not sure if he had came in me or not.

But when I went to masturbate today my vagina smell is off, and I know the way my kitty usually smells!

Is it possible he came or had pre cum in me?

Could I be pregnant?

He kept reassuring me he didn’t cum in me, but also told me to take a plan b just in case?

I know I can just test soon

But is this even possible?