Progesterone levels for pregnancy??

I had my progesterone level tested, we've been TTC for 8+ months, the nurse called and said it was "normal". She said you need a 10 to ovulate and mine was 19.9, and nothing else. OB is out of town for 2 more days and she couldn't give me more info
Until he is back. They checked me on day 21. I read somewhere that during the fist trimester levels can be 8.8-48.8? I haven't used any medications or creams etc. What are your opinions , early pregnancy, or just a high level? 
Thank you!