HCG slow rising question?

Theresa

I’ve had a bunch of HCG blood draws due to bleeding (not heavy enough to have a pad but every time I wiped and would occasionally make the toilet red) which has stopped now but now my numbers are still increasing but a slower rate at each new test all where done 48 hours apart besides the last one which was 72. Just looking for insight my doctor had me go for an ultrasound they saw a gestational sac measuring 5 weeks 1 day and have me coming back. She has already informed me that based on my number and ultrasound dating vs last menstrual cycle that this pregnancy is probably unviable.

Test 1 - 92 (bleeding started)

Test 2 - 190 (doubled)

Test 3 - 380 (doubled)

Test 4 - 772 (doubled)

Test 5 - 1458 (bleeding stopped officially) (80% increase in 48 hours)

Test 6 - 2332 (60% increase in 48 hours)

Test 7 - 3869 (40% increase in 48 hours)