Beadin I reckon it just might do the trick for you! Its pretty much what happened with me, we had all the testing done = all clear, and i convinced DH that if the month was another failure then we were going to the fertility specialist - and ala, i got my BFP finally :)
Have you been on vitex long? I think i have heard that for some women it can cause issues if taken for too long?
Maybe give Soy a shot, its supposed to be the natural equivalent to clomid - and it did the trick for me and suregena..
Best of luck hun, i really really hope this happens for you soon! I'll be stalking you LOL..