Could a dr miss a heartbeat?

Megan

Hello, I’m currently 9 weeks pregnant. I went in for a ultrasound last week and the dr told me she could not find the babies heartbeat and I was going to miscarry( baby measured 8 weeks). I heard and saw a strong heart beat at 7 weeks and I’m just wondering if it’s possible they are wrong. I’m going to call today to get another ultrasound before I go through with a d&c. I don’t want to give myself false hope but I had such a good feeling about this one! And I have no other miscarriage symptoms. Anyone who has been through something similar I would love to hear your thoughts. Thank you.