Am I out this month? Advice please :(

Jennilee • TTC # 3 since June 2014
Hey ladies! I'm very discouraged this month. I'm currently 8dpiui and had my progesterone drawn on cd 20 and it was 19.2 and then again on cd 21 and it dropped to 14.4. Doesn't progesterone continue to rise if pregnant? I'm so sad and crying already. I was so hopeful this cycle :(