Hi I Am Married For One Year And After 3

Hi i am married for one year and after 3 months of marriage my periods got irregular i went to doctor she did my hormone tests like fsh , lh , prolactin and results of all were disappointing.i was diagnosed with PCOS and dr said my endometrium is also very thin.she prescribed me metformin and duphaston.please tell me is dupaston safe ? I am taking it from past 2 months And what should i do to get pregnant?