Postinor 2

Shanali
I have been using Postinor 2 for like 2 years. Me and my bf have once in every month and I take Postinor 2. My periods are not regular. So we dont know which is my fertile period. Do you guys think Postinor 2 won't work because I'm having it for 2years. And my bf never cum inside me. Please reply my question.  
        Thank you ❤️