Is it likely my girl is pregnant?

She takes birth control but stopped because her period. she is taking it again tonight but we had unprotected sex for literally 2-3 strokes before we grabbed a condom. i have anxiety so i’m worried she is, is it worth getting plan b?
Update: I got plan b just incase thanks yall I know its highly unlikely since it was a short time but she took a plan b within less then 48 hours
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