I started spotting a week and a half before my period for three days. On the third day I had sex and bled and it was done, the next day it was light spotting. Im on sprintec but haven't missed any pills this month. I did take a pregnancy test but it was seven days before my period So it was less than 50% accurate. SOO I have no idea what is going on right now. I've had a little bit of cramping but fairly light. What could it be?