HCG/Progesterone levels

I had blood work done at 5 weeks 1 day and my HCG was 387 and my progesterone was 16.5. My doctor said the numbers looked good but wanted to see my progesterone at at least 20, so she recommended I start taking progesterone pills to help get that number up. From everything I'm reading it seems both numbers are pretty low... My doctor didn't seemed concerned and didn't even recommend a re-draw. My next appointment isn't for another 9 days and I'm feeling really anxious! I had a miscarriage in November so I hope everything is ok.