This might be a stupid question

Can I get pregnant if my boyfriend cums in my butt?

We done anal unprotected the first day I was on my period ( so 2 days ago) he finished inside of my butt . I’m worried I might have a chance of getting pregnant?

After we finished I went to the bathroom and tried to push it all out.

It might be a stupid question but it’s a genuine question.

Can I get pregnant if my boyfriend finished inside of my butt?

Someone plz help ease my anxiety