PLEASE HELP 16 and pregnant

had sex last thursday... according to my calendar, it says i had 33% risk.

he did not cum in me, but i know there’s a chance due to pre cum.

i never had a brown discharge ever, but this is the first time i’m getting it today.

is this a sign of pregnancy???

please help, i’m freaking out.

my period comes in a week from now, if it does not come, i will be taking a test.

if positive i will inform my parents.

but for now, any advice???

i’ve also cramped two days ago.. again, never cramped during period either