I have a five week old who is allergic to his cot and to get some sleep we have resorted. to co sleeping. to add insult to injury my 2 year old who slept 8-6 will now not sleep in bed unless me or dh joins him in the middle of night we had moved him from cot bed to bed and while he can't get out he will not go back to bed on his own. new baby is waking every three hours but I don't want to co sleep and wonder which sleep issue to tackle first shoul I put toddler back in cot bed as he can be left in there and will go back to sleep after sustained crying cant be helped. any bright ideas