I’m so anxious

So i got off the pill had a withdraw bleed blah blah and had sex when the app told me i was ovulating( which I’m not sure is accurate being that i haven’t had a real period yet) he pulled out but i took a plan b anyways is there any chance I’m pregnant I’m sorry but i don’t want to be I’ve been a little crampy every now and then but my period is not supposed to start for another week but i feel like my stress could make it late