Hi I am diagnosed with pcos my overies are enlarged doctor, take metamorfin, having brown discharge but no periods helpp, unmarried.21yrs old, never had sex?

PCOS is driven by. low fat diet, ie. carbohydrates & is a metabolic syndrome, pre-Diabetis Mellitus physiologic state. Metformin may help (but is weak & induces GI problems), food choices are dominant. Study my answers, http://www.dietdoctor.com, https://www.youtube.com/watch?v=I0WOqaTTzaI&list=PL9E35F689C3F67D03&index=12 & https://www.youtube.com/channel/UCyxv-Kecjm1eH83nmDmVlvA for some better understanding.
Discharge. the discharge is likely old blood. You probably need a progesterone withdrawal every month or two to get your period to be more regular. In the U.S. we use provera (medroxyprogesterone) typically for 10 days to help you cycle properly. Metformin is the right medication for PCOs patients, but again you made need to provera (medroxyprogesterone) too.