Can Primolut-N Be Taken To Postpone Menstrual Periods?

My periods are normally irregular due to pcod. My last period date is June 25th. I consulted a gynac on 16th Aug and he perceived me primolut n for 5 days 1 daily for 3 times. Now its my 4 day after stopping medicine and still didn t get my periods. If I didn t get periods today, I want my periods to come only after step 10th....since I will b traveling for 2 weeks.….. Kindly suggest me what to do... Can I take primolut n again for 10 days or can I take oral contraceptive pills for 21 days