My 4 Month old has always been a fantastic sleeper, waking only once or twice through the night. On Sunday we returned from spending a week with family and ever since we got back we've been having major sleep issues. He falls asleep easily, but about 3 hours into the night, he wakes up and will not go back down for hours and hours. He's currently been awake for 5 hours, he's never even awake that long during the day! Any suggestions on how to remedy the situation? I go back to work in a week and will not be able to function on just a few hours sleep or nap during the day to make up for missed sleep. LO has recently started rolling, which I think may be contributing to the problem. Any advice is appreciated!