5 weeks no baby

I went for an ultrasound and my dates were off. I thought I was 6 weeks but im 5. There was no yolk sac and no baby. My ultrasound tech just said I ovulated late and brushed me off. I have another ultrasound at 9 weeks. Ive had a blighted ovum before so I’m scared. Advice?

EDIT: this is transvag