Anatomy scan

Anyone get nauseous with ultrasounds? After my normal ultrasounds I sometimes feel slightly nauseous. However, 20 mins into my anatomy scan today, I was extremely nauseated, I had to sit up and I got extremely dizzy, to the point of almost passing out, and then I threw up! I felt better so we continued and 15 mins later, the same thing happened! I haven’t been nauseous since week 13 and I threw up more today than I have in the past 20 weeks! I don’t know if it was because of the pressure of pressing on my stomach or because I was laying on my back. 🤷🏻‍♀️