possible to get pregnant? NEED ADVICE

The other day I had a threesome with my husband and another guy.. we were kinda high and didn't realize that he was inside of me raw.. pretty sure he came inside of me or on my pussy. And now I'm scared that I'm gonna get pregnant by this other guy. I'm supposed to get my period on wednesday tho.. and I took plan b literally within the next hour after it happened!
Do you think I can still get pregnant or no because I wasn't even ovulating then either. So idk I'm just nervous and think about everything and the worst! 😫😫