HCG Levels

Autumn

I got a positive pregnancy test on Sunday went to the doctor on Tuesday they guessed I'm about 5 weeks and 1 day based on my lap my levels were....

HCG 1312

Progesterone 13.32

Estradiol 172.9

I went back today and they saw a sac and a yolk potential although it wasn't a complete 48hrs but my numbers were

HCG 1717

Progesterone 16.80

Estradiol 290.7

Which means my numbers only increased by 30% anyone have any insight on this?