You should use hormones for withdrawal after excluding any other causes for the absence of menstruation
. Please exclude pregnancy
and get a trans-vaginal/pelvic sonogram before taking any further treatment. Please get a local exam by a gynecologist. In PCOD, treatment should continue for some period to attain maximum results; stoppage of treatment mid-way creates cycle disturbances. Metformin
usually helps in regularizing cycles even without oral pills
. Please maintain a healthy weight and a healthy diet along with regular exercise. Hope your query is clarified. Wish you good health.