Help

im 24 and i started taking birth control (diane 35) on tuesday and it was on the last 2 days of my period, my boyfriend would always pull out and today my boyfriend finished inside since he knew i was on birth control and i feel like it was still too early i know you’re supposed to wait the 7 days and i’m wondering if i should just take a plan b? ive never taken birth control so i’m not too familiar. what’s your advice? should i take a plan b?