I had unprotected sex with my boyfriend yesterday. And yesterday was my ovulation day. So in a jiff, I took Mercilon after 15 hours and then experienced spotting...a thick, reddish, mucus type blood! I've never been on birth control pill. What are the chances of me getting pregnant? And what are the chances of avoiding it? I have been on Mercilon from 2 days and i am facing stomach pain..but the 2nd day there is no bleeding but the pain remains and nauseous feeling also What i have to do now??