Low progesterone!?!

So I went to the Ob yesterday and they calculated that I'm 4 weeks and 4 days. Did all the standard blood work plus progesterone and hcg levels bacause last pregnancy which I miscarried I had low progesterone and was put on progesterone meds. My hcg levels were ok but once again my progesterone levels is low at an 8.86 and they said it should at least be a 10. Getting results Friday if they increase or not. Hoping and praying they do. Has anyone else experienced this and had a healthy pregnancy and baby? Please let me know I'm super worried now :/