hi...im 17 years old i first started my period when i was 14 years old... i never had a regular period it was always irregular so i never know when my period comes down! sunday february 3rd i had unprotected sex with my boyfriend! im not sure if he came in me or not but the next night i started to get brownish stains in my underwear & the day after! wednesday i started to notice some pinkish stains as to if my period was coming down! everysince we had sex that day i've been having real bad stomach pains, i had a little diarrhea problem wednesday & all i do is sleep! even tho its only been 4 days since i had unprotected sex is this signs of pregnancy? anyone? please i need help!!!