i had sex with my boyfriend one night for a while , the first half we were protected , the second half we weren't , but we were pretty smart about it . but that night we were scared that i could have gotten pregnant , or his sperm was in me i guess you could say . but after that night the next morning i had gotten my period , i usually don't keep track of my period i just let it surprise me . but when i ended it i had a brownish blood at the end with some blood clots , but lately I've been weak , & having really bad headaches . i'm not sure why . also i don't want to eat , but i get stomach aches , can someone give me some advice ? i need some help , cause i'm afraid to talk to my parents about this , they'd freak !!