Based on HCG levels doubling every 48 hours, I think the numbers are looking pretty close

2nd July ~ 24
4th July ~ 48 (double 2nd July in about 48 hours)
6th July ~ 96 (double 4th July in about 48 hours)
8th July ~ 179 (is pretty close to doubling in about 48 hours)

So while the numbers aren't high they seem to be going up at a consistent rate, good luck!