Hi! Ok, I just found out I'm not pregnant

. So, I am going to try to use vitex to get my cycles regulated. My question is, when do I start taking it? Yesterday I had spotting, and today is full flow, so today is CD1. Do I wait for AF to finish, or start taking it while I'm still bleeding? Also, if it does happen to work, do I stop taking it next time I get AF or just continue taking it everyday? We're taking a short break from TTC, but when we try again, we'll be using soy. Any help here would be greatly appreciated! Thanks in advance!