Hcg and progesterone levels.

I started bleeding last Saturday. Went to the ER the said I was probably going to miscarry. I followed up with my OB Monday they said everything look great! And my bleeding had stopped by then. 
They did a blood test Monday to check hcg and progesterone levels. Came back both low. They put me on supplements for progesterone. Retested again yesterday results in today they said my levels are not doubling or tripling like they should has anyone else had this happen? Were you able to go full term? My levels from the ER were 1304 Mondaywere 2714 and 3403 today. 
I am 5 weeks 4 days today.