What Causes Vaginal Bleeding After Taking Emergency Pill Followed By Sex?

hi my name is deep and i m 35 year old female...i just want to knw...actually i had sex with my husband on 2 day of my periods without any precoiusion but i had emergency pill within 30hrs...but my problem is after 7 day period was strated again and will remain 5 days..now i m confuse about my period date.. and i want to know is i m pregnant??