3 month old baby sleeping

Well, I am sorry but babies do not have a specific sleeping pattern and they will pretty much sleep whenever they like. Babies will nap for around two or three hours at a time during the day and this is considered to be normal. The sleeping schedule will be predictable during the third month to an extent. But each baby is different and no one can say that for sure what the baby will do at any given time. If your baby sleeps for more than 4 hours then it is better to wake him or her up. Try to keep the baby active when she awake.