No yolk sac

Hey everyone!

I went in for my first US today, based off last period I would be 6w1d, but I did an

IUI

so based off of that I’m 5w5d.

Today we saw the gestational sac and what looked like the beginning of the yolk sac. Dr said placement and everything looks great and next week when I come from my scan we should see fetal pole and heart neat and said how happy she was for us.

Should I be worried that we didn’t see the yolk sac?

I should note HCG levels look good and have been doubling