First ultrasound

We can never really put your mind at ease.
Advice: call them. Say that you're worried and don't know what was meant by that remark.
Hopefully, they can reassure you.

If needed, ask if you can drop by in the meantime because you find the uncertainty really tough, especially considering your journey leading up to this pregnancy.

Hey girls, in the beginning when you get an ultrasound so early, they can't measure the baby optimally because it's still so small. I was also told to come back 4 days later for my first scan, but the midwife said it's normal to be so early in the pregnancy.

Tomorrow I have my second ultrasound and according to my calculation I should be 8 weeks and 6 days, and according to the previous scan I should be 8 weeks and 2 days tomorrow. I'll let you know what came out for me, because I'm 100% sure I'm further along than 8 weeks and 2 days. I know exactly when my ovulation was.