My six months old son used to sleep like a champ until 7 am every morning... but in the past few weeks, his wake up time has been creeping earlier and earlier. This morning he was up for the day at 4:45 am! We haven't made any changes in his routine, his diet hasn't changed, no big changes in our family... I can't figure out what happened, and I don't know what to do. I also have a toddler at home who is very active during the day, and I need some rest. Any suggestions? Please help if you have an idea.