Help! Low beta, doubling, after natural FET.

Has anyone had a similar scenario that ended in a viable pregnancy?

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 - next HCG test scheduled.