A little over a week ago I had very light spotting and I thought it could be implantation spotting. Ever since the spotting I have been experiencing headaches, back aches, weird feeling in my stomach, major gas, tiredness, some soreness in breasts, darkening of the areolas and sometimes very dark prominent blue veins on chest, arms and hands. I took a pregnancy test this morning and it was negative and today is the day that I am supposed to start my period and I now have when I wipe light brown blood. Could I still be pregnant?