Why did I call the Dr???

I finally got ahold of someone about my bloodwork. The nurse told me that the Dr wrote "weakly positive" as far as hCG levels, and progesterone was only at 15.4. now, I KNOW my prog. level should be at least 20, so i'm a little worried about that. I'm also worried that my hCG level was so low. When I miscarried in August, it was 610 at the same number of day past ovulation (17 DPO). So, maybe I implanted late this time. Or the number was high because of an impending miscarriage. But "weakly positive" makes me think, like, 7. So, I'm a bit worried about that. Ugh.