Period?

Caitlin
So my husband and I just started ttc this past month. The days right after sex I experienced severe cramping. 
At 12dpo (a day before my period,) I got a negative test and I wiped and had brown blood. I put a tampon in and took out midday to only a little blood. Same thing happened the next day, but more brown blood. Now no blood! I think it was too heavy to be implantation bleeding, but has this happened to anyone? Just a two day light period? I would appreciate any advice...feeling confused?!