Getting nervous somethings wrong

Went to the follow up for my anatomy scan. This is our second baby.

The doctor said the sonographer made a note that there was something big near his belly button but “had the color on” and the doctor thinks it’s a vein but wants to rule out a hernia. We’re going for another ultrasound in a week to check. The doctor did not seem concerned and thinks it’s a big vein... our anatomy scan was two weeks before our follow up appointment. I feel like maybe she would’ve called if she was really concerned too?

she also said the baby is measuring at 98th percentile for size.

Anyway, I’m getting nervous. I just want him healthy and happy :(