Progesterone

I had a miscarriage at 7.5 weeks. My RE checked my progesterone every week so I don’t think it was linked however I’m nervous about getting pregnant/having another miscarriage. They just called with my levels for this month 7dpo (we did <a href="https://glowing.com/glow-fertility-program">IUI</a>) and my level was 13. They said anything above 8 is their standards, medicated or not. My pregnancy cycle was 12 so this is similar but still nervous this is too low? Wondering if I should just try a natural progesterone cream since they don’t want to supplement...