What would be a good day 21 progesterone level?

Shannon • TTC baby #2 for 6+ yrs. Healing from mc 3/15. We have 1 precious boy & his hearts desire is to be a big brother...
I just got mine back & it was 31. This us my 2nd <a href="https://glowing.com/glow-fertility-program">IUI</a> chlomid cycle & the nurse (not a fertility nurse, long story) could not interpret them. My DR will call me in the morning, but I'd be grateful for some insight... Thank you!