Decreasing progesterone

Rebecca
I need some help ladies. I'm hoping for some positive stories, but I'm not hopeful! I'm 5 wks 4 days and had blood work on 6/12 my hcg was 150 and progesterone 16. Today I had repeat labs and hcg was up to 473 but my progesterone dropped to 5. :( they prescribed prometrium 200mg vaginal suppositories once a day and I go back next Wednesday. I'm so nervous. Has anyone else had a drop in progesterone or know anyone who has with positive results?? I had a miscarriage back in November 2014, just hope I don't have to go through this again!!