Painful ultrasound sound

I had my ultrasound done yesterday for the Nuchal Translucency, and it hurt. She said she had to apply pressure to get the right view, but at some point I felt like she was being a bit rough.. when the baby didn’t cooperate with her she shook the ultrasound wand really hard over my stomach while applying pressure. I don’t know if I’m over sensitive.. or what. Is this just part of the test ? Anyone else experience the same thing ?