I always thought that calling it a boy was more 'for sure' and less open to error since there's something there to see IYKWIM. I was all 'what if she's wrong' when I went the first time and they said girl. The next scan confirmed things so I'd say just trust the sonographer. They do it a lot and don't just blurt out gender haphazardly without being sure. She / he knew what they were seeing. It's blue!!! A boy. When I was getting very incorrect boy vibes about G I totally fell in love with the idea of a son. I still want one but my initial get feeling was girl and when I started to feel boy it took some major adjustment and now it's back to girl I've switched back and am totally thrilled but basically, I would have been either way. Boy / Girl / babies / children they're all wonderful in their own individual way rather than gender specific ways.
Your daughter is so loving and so sensitive and sweet. You really did a wonderful job bringing her up. She was a little gem on the 'guess what, I'm pregnant, you're a big sister' video too. I hope G grows up to be a lovely as KY!!!!