How Effective Is Cytotec For Irregular Menses?

Hi,can you please help me doctor,for last month I never had my menses,and a pharmacist introduced this medicine to me cytotec,but i tried twice of it, 1 in the mouth and i inserted 1, I had a little flow of blood,but it stoped,* DOCTOR,please i want to know if its safe or i can still try it again.