My little one recently turned 19 months old, since around 8 months he has slept 12 hours straight every night. Around 2 weeks ago he started to wake once or twice I think he night crying and wanting to be picked up, all of a sudden he doesn't want to be in his cot (he has slept in his own room since 6months old) now things have gotten worse to the point he's up every 1-2 hours crying and will only settle down when laying with me, he will lay with me some nights wide awake for a few hours then eventually fall asleep. Last night he was awake till 4am and then fell asleep with me. He has always had a strict routine, bed at 8pm every night, he has a routine throughout the day also. I am unsure of what the cause of this could be and would be grateful for any advice you have.