Low HCG numbers & bleeding.

Hi all, wondering if anyone has had similar bleeding and low HCG to start and had a viable pregnancy. The dr at the beginning said not viable or ectopic now they’re saying it COULD be viable but it’s concerning.

6/24

* transfer of 5 day embryo

* Bled like a normal period from 7/6-7/10

7/8

* 4 weeks 5 days

* HCG @ 78

7/10

* 5 weeks

* HCG @ 175.8

7/13

* 5 weeks 3 days

* HCG @ 480

* ultrasound finds gestational sac in uterus to rule out ectopic.

7/15

* 5 weeks 5 days

* HCG @ 834

7/21

* 6 weeks 4 days

* Ultrasound scheduled.