Worried, please help😓

I take my birth control (Orsythia) everyday but not at the same time everyday, but the past 5 days i have been taking it in the morning around the time i am supposed to and on that 5th day, i let my boyfriend cum inside me for the first time.. I'm kinda worried i might be pregnant and should i take a Plan B.. Someone give me some insight on this and help clear my concious!