Vitex to regulate Period/ovulation? Sorry, this is long.

Hey ladies! We are not currently ttc, (not trying, but not preventing) but plan to start soon, so I have been doing some charting and checking on things. My period is super irregular. I never know what or when to expect it. I have everything in line to start ovulation test this month and soon as AF ends as my obgyn has recommended that way if there is an issue we can go back and look. We did not have problems conceiving our first baby, but I was pretty regular then. I never got back to any kind of norm after I had him though(1.5 years ago). I'm wondering will vitex help to regulate my cycle to make ovulation prediction easier? Also how do I go about taking Vitex, in what dose and how often? Any other insight would be greatly appreciated! I'm all ears to any and all advice!