Is this a boy?💙

Kayley • 24 years old, I have a little boy who’s 4 and I’m TTC my second baby!! 👶🏻
I went for gender scan at 16 weeks and the ultrasound tech said it's a defo boy, which i also thought, but after ready people's post on this I have started to become really paranoid about if it's wrong😂 please put my mind at rest.