Saw heartbeat, HCG57000, but progesterone 6.4

My doctor said as long as there’s heartbeat and HCG doubled (the blood test was done at 6 weeks 1 day), don’t worry too much about the progesterone level.

My progesterone at 4 weeks was 9.4, and 6.4 at 6 weeks.

I’m nervous, in panic... I need some good advices to calm me down.