Did the baby tango on the 18th. That was the first day of my fertile window, which has been accurate on here. 7 days later, I started having light spotting. Of course I got my hopes up thinking it was implantation bleeding. But as the days went on, the bleeding became heavier. As if it were an out of cycle menstruation. But I have been regular. And I had JUST had a period! as of today, it has about stopped. very light now. But there's no way it could be implantation bleeding. too heavy and lasted too long. any advice other than go see a doctor? I really don't want to run to the doctor every time I have something new or different happen and be that hypochondriac patient. help me out ladies!