My boyfriend and i had sex without a condom

(i am on birth control , the people and am on month 3)

As we were having sex he pulled out and he thinks he éjaculated but as soon as he did and I️t left his opening, we started to have round two of sex.

Should i be worried about being pregnant since cum may have still been on his penus?

Usually he pulls out before he Cums but this time immediately after i got back on so I’m worried :(