Change in the menstrual cycle due to taking menstruation prevention pills

Q 1: A woman took pills to stop her monthly period during Hajj, but her cycle was affected by this. It used to last for eight days, but now it returns three days after it ends and remains for a day or two. Is this considered menstruation or Istihadah (abnormal vaginal bleeding outside the menstrual or post-partum period)? She observed Sawm (Fasting) on one of those days in Ramadan. Should she make up for it or not? Please advise, may Allah reward you.

A: It is most likely that it is menstruation, and she should make up for the day on which she observed Sawm.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.