Baby hit head (see photo)

Em

My 1.5 year old tipped her chair over backwards and landed on the hardwood floor behind her. I turned my back for a second to cut up an apple for her. 😢 Do you think she is ok? She looked at me stunned when it happened then started crying a few seconds later, and cried hard for about a minute. Her pupils look to be the same size and I don’t feel any bump...at least not yet. She hasn’t vomited or anything and is acting her normal self. I feel so bad. Yes, I’ve already moved the chair so this doesn’t happen again.