Eye rolling

Hello, my daughter turned 10 months yesterday and for the past 3 days she started doing this thing where she rolls her eyes back. I of course was nervous and took her to the emergency room. She was seen by a pediatric neurologist who didn’t think it was seizures or autism or anything like that and thought it was probably just a normal part of her development and finding her eyes but it is still freaking me out. We are getting an EEG today just to confirm it’s not seizures. I read online some babies do this for a couple weeks and then stop. Has anyone else experienced this? It is hard not to be scared.