hi i had unprotected sex with my gf 4 days after her period we didn't use protection but at first and i think i got pre *** inside her, so she took postinor 2 a few minutes after sex, but 8 hours after that we had sex again but this time with protection. but i'm worried that the drug won't have an effect on her after we had sex again. so my question is, should she take another pill?