Ok so my 21 month old has been sleeping badly since she turned 12 months used to be a great sleeper up until then !used to go into the cot awake and fall asleep by herself in her own room . Then all of a sudden she would cry hysterical if i left the room there was no change in routine or anything she has a dummy and comforter. She is also an only child. So i had to start sitting on the floor beside her cot until she was asleep. If she woke during the night i would have to do the same thing and she started waking up to 6 times a night where previously she slept through. At 18 months I got her a toddler bed as she started climbing from the cot. She was still sleeping the same the change of bed didn't make her any worse or better. Recently for two weeks straight she let me leave and not cry but the last 2 nights we are back to square one with me now standing at the doorway until she's asleep. I am at my wits end any advice will be greatly appreciated have tried to let her cry it out and put her back in to bed everytime she gets out but nothing works !!