Possible twins no heartbeat?

Heather

We just went today and based on LMP I would be 8 weeks but the Dr think maybe I am not as far along. He pointed out two yolk sacs and said it could be twins but it’s the sure on that or the pregnancy until things progress. Based on our dates think we are barely 6 weeks. I had a very traumatic miscarriage so hoping for a rainbow🌈 baby or babies. We have another ultrasound in a week.

Has anyone had this experience or think this could be twins?