Took Vitex and still have period

Crystal

So I took Vitex for a month to see if it will help me regulate my cycle . I had gone two months without AF. Now after taking Vitex I’m still on my period I’ve had it for 28 days and my flow isn’t even light . I feel tired and weak. I called my Dr and have an appointment next week. But, had this happen to anyone before ? I stopped taking Vitex