Soon after a period, a woman is in her safe period unless she has very frequent cycles (2-3 weeks). So, chances of pregnancy
are almost nil. Moreover, she has ensured herself double protection with the emergency pill. The pill contains excess hormone to disrupt the normal hormonal
milieu of the body and this is the cause of the spotting observed. Her cycles may remain disturbed for a month or two. If she does not get a period 10-14 days after her expected date,you should visit a gynecologist for further management. Take care.