SOS!?!

I switched to a generic brand of my birth control earlier this week & it was also my period week. I put the patch on while i was still on my period. yesterday it finally went off & this morning my boyfriend nutted in me, should we get a plan b? (the brand the pharmacy gave me is zafryme, my original brand is xulane) from my understanding emergency contraceptive pills do mess up your period regulation but i’d rather be safe than sorry