My son is 19 months now. Since 12 months he was sleep trained successfully by cry it out. In the past three weeks he has regressed badly. He gets up in the middle of the night and cries as long as it takes for attention. I have shushed him. I have tried the slow method of being in the room and leaving slowly. He wakes half an hour later to scream the place down. I have slept in a sleeping bag next to him to give everyone in the house some sleep for a few nights. Last night he woke up and demanded my pillow! I have job interviews to go to and don't want to appear exhausted and that's why I slept on the floor. Why has he regressed so much? He fights naps in the day but is ready for the evening sleep. I just want to let him cry it out but am worried he's going to do it for the whole night and my toddler daughter shared the room. She'll be tired aswell.