First ultrasound :)

Moriah

So I went to my first u/s today and I'm supposed to be 8 weeks exactly but the dr measured my baby as 7w and 2 days and the heart beat was 152 bpm. Shoukd I be worried that my baby's growth is lagging or is this normal?

Also, I need help with this ramzi theory... does this look like a boy or girl to you guys? :) thanks a ton x