My 4 week old baby has suddenly started being wide awake from 8pm til 2/3am. Is there any way of changing this? My boyfriend goes back to work soon so can't expect him to stay up with her like he usually does. I'm not a great sleeper. I can't lie in or nap during the day so i physically don't have the energy to stay up that late with her. I do the night feeds and get up with her in the morning and my boyfriend stays in bed