HELLP!!!!!!!!! Is this normal??? 6 weeks 1 day & no baby inside sac?

Raven

Today i went to the doctor for an ultrasound and based off my LMP i was 6 weeks 6 days. My ultrasound only read 6wks1d. However, the tech couldn’t find the baby and she couldn’t hear or see the heart. She said once she might have saw a little flicker from the heart. She wants to see me in a week, is this normal? She did say my gestational sac and yok sac looked great but that by next week there should be a heartbeat.