Hi Ktgirl,
I took Vitex earlier on in my TTC journery. After temping and realising that my Luteal Phase was too short for a sticky baby. I took it for about 3-4 cycles and things started to settle down to a regular pattern.

Side affects I noticed was high temps.... I also spoke to my TCM man about when to start and stop during my cycles and he recommended taking it until pregnancy. However, I took it after AF had finished until O'ing.

HTH and all the best