Should I eat before my ultrasound?

So I’m going in for a fetal echo tomorrow for my baby just as a precaution because I had a heart condition as a kid so they wanna make sure baby’s heart is fine. I last did one with my daughter 4 years ago and I remember she moved around like crazy and it wound up taking like 2 hours coz she wouldn’t stay in the right position for it. I can’t remember if I ate beforehand or not so I’m trying to decide if I should eat breakfast tomorrow before going at 9 or if that’s gonna make the new baby start going crazy moving. Wasn’t sure if anyone else had done this and remembered what the best thing is to do.