Dating scan today

Went in for my dating scan today. According to my LMP I would be 8 weeks 1 day. Ultrasound tech said she saw a fetal pole but no heartbeat and that I was measuring at 5 weeks 6 days so it would be too early to see a heart beat anyway. They have me coming back next week for another ultrasound, but I’m so scared that this may be the sign of a missed miscarriage. Looking for anyone that has been in a similar situation and had a positive outcome. 🙏