I and my girlfriend mutually masturbated on 21st Feb. I fingered her after touching my penis. Moreover, there was no contact after ejaculation and no penetration at any point. To be on a safer side from precum or any other bodily fluids, she took an Ipill within 24hours. Her periods were due on 25th Feb and has not got them yet. She has had regular periods before. She has not got any kind of withdrawal bleeding and we are worried about her periods and chances of pregnancy.