condom got stuck inside me!

me and my boyfriend had sex tonight i was on top of him (cowgirl position) and i bend my back pretty far as i’m riding him, and his penis slipped out... we noticed the condom was missing. it was inside of me. he had to literally stick his fingers in my vagina and get it out. he didn’t cum but my discharge was all around it. i’m worried of precum or something in my vagina? we have never had sex without a condom and it didn’t feel any different when we noticed. but i’m on my ovulation days, i’m worried... should i take a plan b? if so which one is most effective? (i’ve never taken one)