Hello dear
I understand your concern
Yaz pill contain total 28 tablet.
21 pill of active hormone (white colour) and 7 pill of inactive hormone/sugar pill (brown colour)
Once you finished the 21
hormonal pill then no need to take remaining 7 inactive hormone pill.
I would suggest to start the new pack once you finished the active pill and continue the new pack till you do not want the period.
Once you stop the pill, period will occur in the next 4-5 days.
But if you want to take
primolut N under the advice of gynecologist then start from the 4 day before the expected period date and no need to take inactive hormone pill at that time.
Primolut 5 mg twice daily is advisable till you do not want period (maximum 14 days)
As you are already on the yaz pill, no need to take primolut N as it cause hormonal imbalance and menstrual irregularity.
Delayed the period by continue the active hormonal pill of yaz pill.
Hope I have answered your query.
Best regards
Dr. Sagar