Help advice needed

Danielle

I’m so confused so a week ago I was measuring 6w2d with a measurement of 5.2mm 4 days later I was still 6w2d but 5.9mm then 3 days later I was 6w3d but 7.0mm when I’ve looked it up it’s all different but 7.0mm is coming up as 6w6d these were at different clinics some internal some abdominal but I’m so scared it’s a bad thing ?