Hi, my period ended on February 6th and I had unprotected sex the following day. I took the morning after pill (postinor 2) about 26 hours later. On February 16th, I started to bleed which lasted 3 days. Now my period should have started on the 26th which it hasn't even though I'm having PMS. Am I pregnant? I see that postinor 2 is only 85% effective so am I in that 15%?