i had unprotected sex with my gf.on the 17 th of january 2017..on the 2oth she took postinol 2 at once.on the 8th of feb,she noticed mild bleeding which was not actually red in colour and after some days the bleeding was heavier. and lasted for some days.Associated with headcahe,breast tenderness, waist pain, exccessive weakness,and vomiting..although she is not currently aware of her menstrual cycle which i encouraged her to observe.Did the drug actually work, and when is she likely to expect her next menses