Progesterone levels

Layne
Hello. I had a positive OPK on July 17. I had some blood work done on the 19th and my progesterone was 2.1. My doctor said that was low and that I didn't ovulate so she wanted to start me on Provera. This weekend I get my BFP! I'm worried though that even if I was 1 or 2 DPO when I got that blood work, it should have been higher than 2.1. I called today and haven't gotten a response back from her. Anyone experience with this?