Low Progestrone/TTC

I got pregnant in Jan 2022 and had a miscarriage in Mar 2023. I am concerned that i might have low progesterone and want to avoid another miscarriage as we are TTC. My GYN appt is Jan 30th but we are still trying this month. Let’s say I get pregnant this month (supposed to start period Jan 26th), would I be able to catch my progesterone and have a viable pregnancy if I cannot get my levels tested until the 30th?

I am concerned about low progesterone as I have several symptoms and spotting for several days after my period.