i had a unprotected sex with my bf on 06/05/2010 . my last period was on 30/04/2010.he pulled out from vagina before he ejaculates.i think it was in the vagina only for 3-5 seconds. i took a single dose of z-pill levonorgestrel 1.5mg a pink tablet exactly 12 hours after the sex.i had a vaginal discharge afetr 2 days of tablet intake.now on 24/05/2010 i had small white discharge. my next period was expected on 27/05/2010. but still yet i did not get .. please help me am i apregnent?am too tensed.