It's probably nothing, Rachel. Like I said it has happened to me once or twice and it was certainly confusing but It stopping shortly after and didn't give me any problems. I doubt vitex has anything to do with it. It sounds like you might o soon, fx! I had some cramping yesterday and of course I thought I was ov'ing so I chalked it up to that. Now I hope that I am ov'ing today so I see a definate temp rise tomorrow. Keep your fx for me! I really hope my body hasn't failed me again! I will be so devestated!