Progesterone

Codi
My SO and I have been TTC for almost 7 years. I have 4 confirmed miscarriages, no baby yet. The most recent was at the end of July. I had 2 faint positives so I called my infertility specialist (per his PA they wanted me to call as soon as I got a positive so they could start me on meds). I had blood work done and my HCG levels were dropping. I had clotting for about 2 1/2 days and then it was over. I spoke with a nurse at my doctors office and she said my progesterone level was .08. She said chances of me conceiving without taking progesterone are extremely low, but they won't prescribe me progesterone until I have a confirmed pregnancy. I don't get it! I can't get pregnant without it, but they won't prescribe it to me until I'm pregnant?! Has anyone else had this happen? Is there anything I can do?