Measuring incredibly early after 2 ultrasounds

Hi all! Just went back to the doctor for what was *supposed* to be a 6 week ultrasound only to be told I’m 5 and a half weeks... AGAIN. My first one measured at “closer to 5 weeks” , then about 9 days later, I was told I was measuring about 5 and a half. The yolk sac was bigger, but there was no fetal pole or any sign of a baby at all. I keep hearing that dates can be off by as much as 2 weeks, but that just makes it seem like I was only a week in when I found out.

I’ll be honest, I’m a bit concerned. Is that justified? Am I just going to be 5 weeks forever? 😂😭