Progrsterone levels?

Hi,

I have just received my results from my blood tests, 10 days after the transfer of 2 frozen embryos. My beta hcg is 355 wich is good for 4w2d, but my progesterone level is 8...Before the transfer my progesterone was 15. As far as I know it should increase not decrease.

Do you ladies know which your progesterone levels were when you had your first beta?

Of course I have sent my results to the doctor but I guess I'll only hear from him on Monday.

I'm worried the low progesterone is not a good sign...😥