Can I Take Progynova For Missed Period For Several Months, And If So, What Dosage And Duration?

Im 18 year old and tested positive for PCOD i used to take meprate for my irregular periods for abuot 7 to 15 days but nowadays i cant find any results i.e i am not getting my period its been 7 months and i havent got my period . Can i take progynova if yes for how many days and of what doasage?