HCG result

Date: 2/12 - 1st HCG - 276.75

Date: 2/14 - 2nd HCG - 600.80

Date: 2/23 - 3rd HCG - 833.20

Hi ladies, my concern is from my 2nd HCG to 3rd HCG which is 9 days apart, the reading not doubling at all, currently taking progesterone, no cramping/pain & no spotting so far.. I’m so worried 😔