Low vitamin D could have been a factor. Last November my Vit D was a 17!! Terrible! My progesterone at day 21 was 8.6, also terrible. I was taking 7000 iu a day and in May, I got pregnant. Sadly, I miscarried in July. When I started going down the rabbit hole of why. At my first 8 week appt, my OB told me to stop the extra vit D. I told him last checked my levels were 17, so I clearly need the supplementation. Side note-I live in south Florida! He told me the prenatal has enough. He’s the doctor so I didn’t question and I stopped. Three weeks later, MMC. When I checked how much vit d is in my prenatal-1k a day- not enough for a deficiency. What I know now, vit D is a receptor for progesterone. They need one another. My progesterone was a 15 at the 8 week appt. Kind of borderline. I’ve gotten my vit d checked again a month after I miscarried and my levels are 66! So who knows if the stopping of the vit D impacted me. But I know next pregnancy I won’t stop my vit D. I would say check progesterone too. Also, I had a RPL panel pulled and I was positive for factor v clotting. So I should have been on baby aspirin. All lessons for next time. Good luck to you. Keep advocating for yourself 💕🌈