It's just a normal ultrasound. Have you had a blood test? I'm in Australia and we have a blood test first and then a ultrasound. They just check bubs measurements and look at its organs are working etc. It's nothing to be concerned about at all. The chances for most people that they have something wrong with bub eg down syndrome is so rare
I had my first appointment last week, the doctor checked my cervix to see how far I was and drew some blood