Has it happened to any of you that HCG increases from 520 to 560 in 48 hours?

The doctor is not optimistic and already told me that this pregnancy is not viable. Anyways she wants to check once more the HCG on Monday to confirm this.

Has any experienced slow hcg growth rate at the beginning and later it turned out to be a healthy pregnancy?

I don’t know what to do at this point, just keep getting worried.