vitex- stop taking at ovulation OR after first trimester?

Ho
I've read both methods for when to stop taking Vitex. I am only taking 800 mg a day, even though the bottle says 1200. I just ovulated yesterday at cycle day 40 or so. My last cycle was 85 days so I am happy. It could be from Vitex or acupuncture. 
Just want to hear what other women did. I would rather stop taking Vitex now. Thinking of go to one pill a day until I test for pregnancy then slowly ween off from there. Thoughts?