Worried about low progesterone

Marcy

I'm 4 weeks and 4 days. I had a previous mmc and a chemical in June so this is my third pregnancy. I had my beta hcg levels done this werk and my hcg level is more than doubling. I'm worried I have low progesterone because of the previouse mc's I've had but my obgyn won't check it. What should I do?