implation bleeding?

Alisha
so me an my bf had sex on Feb 14 without a condom but but for like 20 seconds bc the postion we were doing hurt my stomach so we stoped but Im suppose to get my period in like 3 days and this morning when i woke up i had light brown discharge. sometimes i do get it before my period but ig im just a little worried. could i be pregnant or should i not worry