second plan b??

(plz NO hate. i have an appt abt bc options next week). things got heated last sunday the 3rd and my bf and i had sex with no condom. he pulled out. i took a plan b later that night even tho it was after my predicted ovulation window. just to be sure. fast forward 5 days, to today the 7th. we were having sex with a condom and it broke. we are honestly not TOTALLY sure if there was cum tht got in me. i’m just wondering if i should take another plan b to be safe or should i rely on the fact tht i shouldn’t ovulate due to taking a plan b just five days prior and my period is predicted to start in three days and usually isn’t too late/off.