Low HCG success stories

Anyone have any success stories with low HCG for the first draw? I went in at 13 dpo and had a level of 20. My OB was shocked because she said she didn’t know how I got a positive on any preg tests with such a low number. She put me on progesterone suppositories even without testing my progesterone. I am retesting this afternoon. Looking for some hope and prayers ❤️