Could i be pregnant ?

Joanna

My fiancée and i had unprotected sex the 24th . ( We're not conceiving but we're not preventing)

I get my period the 6th , so far i've felt fatigue, a bit nauseous, and very very mild cramps. I took a pregnancy test today and it was a BFN. And I'm just 3 days away from my period .. could i be pregnant ?