Hi, I am now 8 days late for my period, the first day of my last period was 9/1/12. I usually have sore breasts 2 weeks before my period, i have had no signs that my period is coming, I have had loose stools for a few days as well, I have taken 2 HPT 3 days after my missed period, and they both read negative, is it too early to tell? I have been tired for the past couple of days, could i be pregnant?