Previous miscarriage and nervous

Betsy
So I've been bloodwork obsessed - 
Here are my betas - I know after 6000 doubling time slows down - anyone have any thoughts?  Doc doesn't seem concerned and said see you at 7 weeks.  Progesterone on 8-24 was 21.4 (was 34 on 8-12)
8-12 : 39
8-14 : 164
8-20 : 1755
8-22 : 3879
8-24 : 8859
8-26 : 12681