My 4 month old (on the 9/27) goes to bed around 7:00pm, df at 10:00, and then is awake usually around 3:00. Sometimes she has gone until 4/5, one night she lasted until 6:00am. I get frustrated at times when she lasts until 5am one night then wakes at 3am for the next 3 nights or so. I don't know if I should be trying to make her stay asleep longer. I really don't have any other complaints with my lo. The feedings don't even bother me really. Does her df interfere with the amount of hours she is sleeping, I mean she sleeps for 5 hrs between df and morning feed or is it 10 hrs, because technically she does not wake up to feed, she is sleeping?