Gender at 16 weeks with twins!

Br
I had an ultrasound at 16 weeks, and the ultrasound tech was 90% positive they were boys! But I've read so many things online about being told a different gender later on in the pregnancy! And now I'm worrying they got it wrong! So what I was wondering is anyone is willing to share some of their ultrasound photos of their little boys? Around 16-20 weeks! Please!