Talk to Gynecologist on PCOS Medication

I was diagnosed with PCOS in May this year. until now I have used three medicines for it including Primoult N for two months (did not work for proper periods), Climen for one month (got period 3 days before course completion), and Diane 35 for four months. Diane 35 worked for three months and I went to doctor only once and started course myself. However, this month I had excessive leukorea discharge whole month (previously, it was only one week post and pre periods). Now I am having spotting for two days and still have 6 days left in my 21 days medicine course. What might be the cause of medicine not working? can it be my low body weight? My BMI is 15