Nothing there

Olivia
Had my bfp on Oct 18. Lmp 9/21. First ultrasound was today... there is a sac, but no baby. Rushed to see the doctor, had hcg levels drawn (no results yet).. was told it will come out on its own. But when?!? The waiting is going to be miserable. I just want this out of me so we can try again. Has anyone else had this? I was supposedly 8.5 weeks...