A Woman may take contraceptive pills to prevent her from menstruating during Hajj season in order to be able to perform Tawaf. Scholars vary in their opinion whether one should take Pills in Hajj to stop Menstruation or use any other means to prevent menstruation. Some are of the opinion that women can use pills to stop menses as long as it is not prohibited or hazardous to health. There are pills available in the drugstores if you want to stop periods during Hajj or delay periods during Hajj. However, for a better understanding of the matter, please consult a scholar. Also, make sure you use these pills only after consulting a doctor.
Note: It is recommended to consult and seek an opinion from scholars on doubtful Islamic matters.