Hello Rimjhim, Welcome to HealthcareMagic Forum.
You can take Primolut-N 5mg for Postponement of menstruation
3 times/day starting 3 days before expected onset of your Period, as it is always ideal. You haven't mentioned when the Function is and when was your LMP? You may want to continue it until you don't want them to happen. The bleeding will happen after 3 to 5 days of stopping it. But, it is my sincere request to you that, you should be getting yourself examined by a Gynecologist so that she can examine you and suggest the best medicine which suitable to your Health.
Good Luck, Take Care.