I had brown spotting 2 days before my period was due, I thought it may have been implantation bleeding , but the second day there were normal period cramps and bleeding, then from day 3, which was the original due date, there was nothing; on the 4th day there still wasn t anything, but Iight headedness, which is still happening three days later. My period has never been like this, and would sometimes only get lighthead before my period.