help please🙃

Kelsie
okay, so me & the bf were having sex today & the condom slipped off inside me & we didnt realize this until after he finished... inside me. i have been on BC for about 5 months now, but today was the first day of the placebo pills & my period is due in about 4 days. should we buy the plan B pill tomorrow or wait it out for the period ????Â