I used postinor1 thrice in a month immediately after sex but yet to see my period

Hello Anon

Thank you for writing.

Take a test to rule out pregnancy but your risk is very low.
You are using emergency birth control as a regular method of birth control which is not it's intended purpose so your menstrual cycle has been changed as a result. We cannot predict when you will get your period but it will come along when you stop overdosing on this medication.
Best,
Susan