How is it in normal range ?

My progesterone is 8.9 at 7 weeks pregnant and my doctor told me if it’s low she’ll put me on progesterone but she called today and said it’s in normal range. I specifically switched OBs because the last OB said the same thing when people on the internet tell me it needs to be over 10 to sustain a pregnancy so now I’m worried I’ll just miscarry again.