Progesterone levels dipped! Is this normal!?

B
My levels were 17.9 last Friday and today at 5w3d they are 15.9 
😓
HGC was 3,995 now 17,725 today 
Help! 
My midwife hadn't had a chance to review yet and I'm freaking out. 
I had a miscarriage in Feb and hope this baby stays.