Confused and upset

Taunie • Baby on the way

I went in today for my follow up ultrasound because they couldn't find a fetal heartbeat at 5w5d (which I know is common so I wasn't too worried), but I'm supposed to be 7w5d today and my ob said she couldn't find the baby in the gestational sac. She said she thinks it's a failed pregnancy, I go in for a 2nd opinion tomorrow, but I feel so hopeless now. My hcg is currently at 83328 and it did rise from 2 weeks ago 23896.