Talk to Gynecologist on Hormonal Imbalance,hypothyroid,pcos And Irregular Periods

Aoa doctor, i am 19 years old and since 2 years or even more than that.My periods have always been irregular koi fix date nai hai and they don't come monthly,i Have been diagnosed with hypothyroid and pcos(cyst).My doctor have told me to take glucophage tablet and primolut n tablet for 10 days every month to get periods but still my periods are irregular and if i get periods they are just for 2 days but normally i used to get for atleast 4 days.My hair is falling out bohot zida,my hair has gotten so thin and now my eyebrows and eyelashes are also falling out. I am very scared and stressed please help me out. What should i do and what diet should i follow for these matters. Will be waiting for your reply.