No yolk sac

Amaya

This is an abdominal US but I had a transvaginal one today. According to my last period I am 5 weeks 5 days today. Not sure why the US says 5 weeks 6 days. If should have said 5 weeks 4 days. But anyways, there is nothing in the gestational sac. I asked the doc could it be a blighted ovum but she said maybe but I’m too early to tell, I’m worried sick … anyone have a US too early & ended up everything being fine?