IM SCARED

Okay so i’m young and i’m having my first pregnancy scare and idk what to do. i’m in high school so i was at school and i went to the bathroom and found i had dark brown discharge. i had unprotected sex exactly a week ago and yesterday but neither of us finished so u wasn’t super worried but i heard that could be a sign of pregnancy and i don’t start my period for another two weeks. i’m really scared rn. i’m also around my ovulation stage so i’m extra scared . idk what to do. my boyfriend is buying me a pregnancy test and plan b but i can’t take it till 6 because i have basketball practice. i have no idea what to do. i’m really scared.PLEASE SOMONE EASE MY MIND.