Did vitex work for you?

Erica • Twin momma :: PCOS
Does anyone have any vitex success stories?!
Here's my background-- 29yo with PCOS TTC for 15months with 3 failed fertility rounds
I take 1000mg of Metformin a day with no significant improvements.  I added vitex into my daily routine and within 4 days, AF finally comes to town after a 64day cycle. 
I'm feeling very positive and hoping there is light at the end of the tunnel.  Fingers crossed that this will be our year!