False positive ?

About a week ago I took a test it was positive. A blue dye. Very faint. My fiancé saw it too. Took three since then all pink dye. And they were all negative... is it too early to tell? I’ve had two days of cramping since then different days different intensity. I thought I was getting my period today but it didn’t come. I’m just so indifferent. I’ve never ever gotten a positive before and I’m just upset because it was positive and then all negatives. Please help 😢