Same thing is beginning to happen to me. I've been feeling odd, nauseated, and just not like myself. Took a preg test 2 days before my period, it was negative, and my period has been really un even and spotty, not like me at all. Normally I'm pretty heavy the first 2 days then it slows down. I've been really light every day...so, I'm going to the doc tomorrow. If you don't get a good answer before then, hopefully I can help you out with what the doc tells me.