Needing other opinions

Kaylee • My name is Kaylee, I have a 6 year old and a 2 year old. I am expecting baby #3 in March 2023!

So I’ve had 2 back to back miscarriages the last 6 months. One at 6 weeks baby had no heartbeat to begin with we think. Also one at 10.6 weeks. Baby had a heartbeat at 7 weeks. I also have a perfectly healthy 3 year old boy. My doctor is testing my thyroid and for lupus and other autoimmune diseases. But when I brought up testing my progesterone (the nurse at the er said that could be a possibility) my OBGYN said that that’s not a cause and it would be stupid to test that. So we never did. The more research I’ve done I’m seeing that that’s very common to have low progesterone? Is that true? Is my doc and idiot? Help me out here guys.