initiates uterine contractions as it contains prostaglandin; so even without pregnancy
it can cause some amount of spotting or bleeding along with cramps. It is always advisable to initiate treatment under the guidance of a specialist after the presence of an intra-uterine pregnancy and the period of gestation is confirmed. You should have confirmed a pregnancy first before taking the drug. See a gynecologist now for a proper evaluation and further management. Take care.