Well despite my reservations, on the recommendation of my acupuncturist, I am giving it a go.
I am a bit apprehensive because a) I have a pretty regular cycle at the moment and am ovulatingso I really don't want to mess that up and b) I tried it years ago to regulate my cycle and I remember it making me feel distinctly odd, i.e. a bit loopy. But I am still not duffed despite 7 cycles of perfectly timed swi and around 2 years of not preventing, so I am giving it a go.
If anyone fancies sharing their agnus castus experiences (positive and negative) please do!
Ps - If anyone has any snake oil they want to sell me at the moment, I would probably snap it right up....