Combs7 thats why i keep going back and fourth on my decision lol with my.son 4 yrs ago i went at exactly 18 wks.and they got.everything fine but wasnt sure if i should chance it again .. :-/
I feel your pain, my first us is Feb 4 I'll be 19.5 wks
The thing you have to remember is that the scan is to measure important organs & bones. That's why they want you as close to 20 (halfway) as possible. It gives them the best idea of how baby is doing.
If u are that anxious I would I got mine at 17 wks +6 & it was clear he is a boy lol
Any time between 18-22 weeks is fine :) o can't wait for mine!