A little background, I started vitex in January and had a normal cycle both Jan and Feb, this month I ovulated later than I was supposed to according to opks, and my period was due on Sunday. I haven't gotten it yet and I'm not getting signs that it's at least trying to start. I've tested and got nothing but bfn' s. But I've been having headaches back to back, random twinges or cramping both abdomen and back, I can smell everything and my moods have been all over the place. Has anyone tested after a late AF only to get a positive days/week later?