CD66!! Is Vitex to blame?

I'm now on CD66 and I'm not sure If it was due to taking vitex? Before taking this, my cycles varied from 19-32 days. So due to my irregularity I started taking vitex. I was taking it for over a month & due to AF not showing decided to stop. I did take a hpt which was a bfn, so now I'm confused to what's going on with my body. I really thought AF would have shown up by now, but nothing. Any help or advice would be much appreciated. I just want to get my cycle back so hubby & I can start ttc again :(