I think everyone gave good advice - you know her best. It's hard for me because of the whole whooping cough nightmare we went through with Kellan. He never stopped eating or nursing or taking a bottle and his disposition pretty much stayed the same....he was amazingly cheerful. Even the ER told me he was absolutely not sick

Hayden had terrible ear infections for months and I'd never know because he had no symptoms - he'd just have a restless night of sleeping!
Just watch her closely for any changes.