pcos and scared of miscarriage

I'm 4 weeks pregnant and terrified of miscarriage. I was put on clomid and conceived my first round. However before I conceived when we took my blood tests to check my hormones everything was normal except my progesterone. It was super low and I'm concerned that this will cause me to lose the baby. I don't feel my obgyn is in any rush to get me in. It's Saturday so I can't request they do a progesterone test.