Is There A Chance The I-pill Won’t Work If Taken Right After Sex, The Day Before My Expected Period?

hi doctor. 4 days ago, my bf and I had sex and the condom accidently broke, and he finished inside. i immediately took an ipill few minutes after washing up. is there a chance of it not working because it has been taken too early? also it happened the day before i was supposed to get my period, and I ve had a regular flow till now.