Is Pregnancy Possible After Having Vaginal Bleeding Caused By I-pill?

hi i had sex with my gf on 20 Sep, but condom failure occurs, and she took ipill within 2 hours, after 1 week(i.e 27 sep) she had vaginal bleeding for 2-3 days(i.e 27 sep to 29 sep).. Is there still chances of being pregnant after bleeding by ipill? i m worried ..plz help