Been TTC for 3 to 4 months now.  I have a consistent period which is three days, only bleeding heavy on the first. my prior week i always have period symptoms of fatigue, bloating, nausea, and cramping. The first month of TTC my period came, but only for a day. The next few months I've had my period regularly. This month I took a pregnancy test the day before my period came and it said negative.. So my period came on time but very lightly and only for one day..(??) So i get get kinda confused when period day comes near because my symptoms makes it feel like I'm expecting.. What should I do?