My 3 year old keeps waking up at 3am and is so noisy it wakes my 1 year old who takes hours to settle back to sleep. By then it's time to get up. My 3 year old won't settle until one of us sleeps on the floor next to her bed. He will eventually sneak out when she's dropped back off. Meanwhile one of us is settling my 1 year old who had no sleep issues but is getting woken up every single night. We are horribly sleep deprived and I'm not sure why my 3 year old is waking at 3am religiously it's such a habit now how do we fix it? My mouth is full of ulcers and I feel sick and migraines daily.