Is Ginette Safe And Effective In Treatment Of Delayed Periods?

hello doctor,i have irregular periods, suffering from pcos .my period is delayed by 4 months. when consulted doctor she told me to start ginette 35 - 21 day pack,i started the course ,tablets ended on 21st may and i got period on 23rd of may ,doctor told me e to start the course from 4th day and i started taking the pills, but today is 9th day , i still have bleeding . can u pls suggest is it ok taking pills in this condition..