What Causes Wet Discharge After Intercourse?

hello sir,i had sex with my bf 4days ago.during sex......during his ejaculation he took out his penis and ejaculated on my abdomen.but for my doubt i took ipill after 2hours.i had no problems till now bt after the day of sex,past 3days my inner wear is getting wet with ovum(ovum).am i pregnant? i not even getting vomitings or any other ill health.