What's going on?

Cheyene
Ok so according to this thing my period starts tomorrow. But Thursday I started brownish/redish discharge and I thought I was just early. But it was VERY LITTLE, minimal spotting. As the days went on its turned more redish/pinkish. Yes me and my bf are sexually active, we use the pullout method. We thought I could have been pregnant at the end of March but had a negative test and got my period. Opinions please.