Low progesterone and hcg

A week ago I got a positive test. This past week my symptoms have been minimal. I have had a miscarriage about 5 years ago at 8 weeks along. The doctors office had me come in on the first day of my missed period (three days after the positive result). I got a call that they were concerned that the progesterone level was 8 and hcg was 104 (very low according to them). Two days later I did more blood work, the hcg was 195 (almost double). Now I am doing more bloodwork today to see if the numbers are going up.

Has this happened to anyone else and had a successful pregnancy? I’m worried about the progesterone levels being so low. They did prescribe me progesterone to take orally once a day.