Baby Girl Wants To Sleep All Day

Laura
My baby girl, Wendy, lately has been sleeping most of the day away. At first, I thought she was sleeping so much because she has been sick with RSV, but now she is up most of the night nursing. The only time she wakes up during the day is to eat and get her diaper changed. We have tried keeping her awake, but she just nods off. She use to sleep well at night, going to bed between 10 p.m.-12 a.m. and sleeping to 5-8 a.m. Then sleeping for an extra 2-3 hours after a diaper change and feeding. Any other mommies experiencing changes in sleep habits? Luckily, we have a pediatrician appointment Thursday, so maybe her doctor can give me some answers.