my boyfriend and i engaged in direct genital-to-genital contact on December 28th. He was rubbing his gentials against mine. We however did not use a condom, or any form of controception. There was no penetration or ejaculation, however my period is late by 5 days ( but my periods are irregular as I just turned 17) and all i've been having is cramping of the lower abdominal area with a whitish discharge, but no bleeding. Is there a chance i got pregnant from preseminal fluid? My Last period took place on December 19th and lasted until December 23rd.