Low progesterone baby #1, ttc #2

My husband and I have been ttc baby #2 for 11 months now. When I got pregnant with my son I had to have progesterone supplements through the first trimester. Can't get help from a doctor for another month. What I'm curious about is since my progesterone was low during pregnancy would it be accurate to assume I could have low progesterone now, making it harder to conceive? Any information or personal experiences would be great!