Early scan no yolk

Cheryl

Hello All I went for an early scan at 6 weeks they only identified a gestational sac and no yolk the sac was 7.8 mm they said it was likely a result of the pregnancy being earlier than I thought however I feel from research the sac would maybe be smaller if I was 5 weeks what does everyone else think has anyone else been in this situation? They said to come back in 2 weeks to re scan