May have ectopic pregnancy

Tai • Wife of 1 Mother of 3 expecting #4

So I’m 5 weeks and I was just told they couldn’t find the sack but it might be to early. My hcg level is 2800 though. So they want me to come back in 2 days to makes sure it goes up and to see if they can see something. Has anybody else going through this and still had a viable pregnancy?