What Should I Do About The Lack Of Menstruation Despite Taking Primolut-N And Diane 35?

My periods cycle in irregular..from doctor consultation I ve get to know that maybe im having pcos...he consult me primulat.. after using that i got my periods and in 2nd day i started using diane 35 (21 day course) but I ve been missing tablets mostly during that cycle like I ve started taking diane on 21 july n completed pack on 25 august.. spotting was there for many days but I didn t get my bleed periods..now should i wait for periods to come or again start primulat and restart the cycle this time without missing any tablet? I m not married..