I had unprotected sex right after menstruation on 9th December 2016 and took in postinor exactly on time. Exactly 5days later i started bleeding for 2 days. Then i had unprotected sex again on 31st of December and took in postinor exactly on time but six days later i started feeling sick, my head and stomach aches alot, i feel that my breast is heavy now and there was no sign of bleeding tooo. And most importantly i havent had my period till now. Please help