Metformin, Provera, and Clomid!!

I will try to keep this short. I did three cycles of Provera/Clomid a few months ago. Took some time off from TTC. Then I was put on metformin. I've been on that for a little over a month and have started Provera today. When do I start the ovulation testing? When I start the Clomid days 5-9 or when I finish the Clomid on day 10? Any advise would be appreciated.