Will Idoz-72 Prevent Pregnancy After Unprotected Sex?

Hello sir, we had sex after 16 days of her minsturation. i wear condom but its broke during sex and all the discharge went inside.after 2 hours she took idoz-72 medicine for contraceptives.but still she is not being minsturation. is it possible to be pregnant in this situation. please let me know i am very fearing with that. thank you very much