How much difference will 9 days make?

Linzey

So I had my first ultrasound 9 days ago thinking I was around 7 weeks dating from last period however she dated me to be about 5/6 weeks and seen a gestational sac, yolk sac but no Fetal pole.

I have my next scan tomorrow (9 days later) should I expect to see much more assuming everything is ok??

I’m so scared...