My toddler vomited 3 times last night, seemed like it took the 3 times to completely empty his stomach. He did not have a fever and had been normal all day.

This morning he has been fine. He woke up at 6:30 and had half a piece of toast with water. Then a couple hours later had some cheerios (no milk) and water. So far he seems fine, it's now 9:30.

Is it possible this was a one off? Maybe he ate something that didnt agree with him? Or could he start throwing up again? Do toddlers usually have other symptoms if it's a bug?

This is my first time dealing with vomiting.