Is tripling okay?

Expected period date: July 24 positive pregnancy test July 22

Hcg on

July 24: 62.3

July 26: 205.9

July 28: 643.4

July 30: 1,960

Does this sound okay? Should I be worried about a molar pregnancy or down syndrome? Unfortunately google has gotten the best of me. I should be able to get an ultrasound soon.