Question on early pregnancy..

I’ve had about 4 ultrasounds already and all of them have mostly been the same. First one they couldn’t find the sac or fetal pole. 2nd one they found it but it was very small. 3rd time same. And yesterday which i am now 8 weeks it looks the same to me can’t really see much and still no fetal heartbeat. They told me that in a week if i go and still hasn’t change they will be ruling it out as a not advancing pregnancy. I know I’m not a OB dr but i feel like this is not a healthy pregnancy 😭.

Any advice? Thank you. This would be my second pregnancy first time i had an ectopic pregnancy in 2009 and now this is happening.