Low Progesterone Early Pregnancy

I found out I was pregnant last week. At 4 weeks, I had Beta testing done and my results came back HCG 23, progesterone 8.9. Second results drawn at 4 weeks 2 days and my HcG doubled to 57, but my progesterone dropped to 5.3. I started progesterone supplements on 4 weeks 2 days. The nurse called and said that the HcG is good, but they were not so happy with the drop in progesterone. I’ve had one healthy pregnancy and one chemical. Has anyone else had low progesterone and had a fully healthy pregnancy? I’m really nervous and scared to miscarry. Any insight is helpful. Thank you in advance!