Yes, there is conflicting information re: Vitex. I personally stopped taking it up until I O'd. I was using Blackmores, purchased from the local chemist.

When I was getting accupunture and I asked my TCM man what he thought and he suggested up until getting a bfp.

I stopped taking it when my LP became regular and greater than 11DPO as opposed to my cycle length. It seems for me my cycles have settled down, it's my O day that varies from time to time. If I O later in my cycle, my cycle length is increased.

Hope that makes sense and