Birth control question

Elizabeth • 22

So I stopped taking the pill a month ago because I wasn’t sexually active and the pill I was taking skipped my period. I have yet to get my period since stopping it. I restarted the pill yesterday. Had unprotected sex the same day so should I go get a plan b to be safe because it hasn’t been 7 days? Idk if me not getting my period since stopping the pill and then restarting it will affect anything.