I had sex with my bf on 2nd day of my last menses.dat is jan 10th,i used an ipill on 3rd day and accidently the next day also we had sex but den we dint take pill.,as i took the ipill within 72 hrs of this coitus. after 8 or 9 days i had mild bleeding like mucous and blood clot together for 3 days..now i am confused whether i have to calculate my next period date from jan oth or from the starting date of my intermenstrual bleed.i am confusef whether it is pregnancy.can i take a primolut n and den stop it to induce a bleeding