Progesterone and Miscarriage??

Kristen • 🌈 TTC Rainbow baby

I had a miscarriage last Monday. They did labs and want me to come in on the 28th to go over those labs. After seeing my results on my online chart, my progesterone was a 0.5. What does this mean? Could that have been the cause of my pregnancy? I’m assuming it’s low but idk what it’s supposed to be. I was 5 weeks to the day. Suggestions??