Concerns about progesterone

I am 7 weeks 5 days today and we were able to see and hear a strong heart beat last week at 6 weeks

Today my RE called with concerns bc my progesterone dropped from 40 two weeks ago to 16 and my hcg was 55000 and he said he would of wanted the numbers to be above 100 thousand

He double my progesterone but that all we can do

Going tomorrow for a check up , but I am fearing that my baby stopped growing

I have no bleeding or cramps. I am in disbelieve right now that things are not going well