What kind of Vitex are you taking? I take Femaprin and it has worked for me. I buy mine at vitacost.com. its the cheapest place I could find. Here is a thread about Femaprin it helped me out alot
The Femaprin Thread . I took Fertilaid for a month had to switch to Femaprin for money reasons and started it on 5-20. Got AF on 6-2. I hadnt had AF for 7 months. Alot of women use NPC too. You may want to look into that.