Hi. I'm three or four days late for my period. I've had the cramping that I get when I start my period on and off for the last few days. It's not as severe ad normal but I haven't got any blood or what not that comes with your period. I just took a 1st response hpt and it came back neg, maybe I took it too soon? I'm thinking of retaking it like a week from now. Did I take it too soon? And if its not pregnancy than what's wrong with me, stress?