My 15 month old has just suddenly hated going into his cot. He was always excellent you put him down and off he goes to sleep now we have to lay him on our bed to get him to sleep then transfer to cot. Then in the night he wakes again and then again is in bed with us- I know this is not ideal but as we both work its the only way we get any sleep. He really screams now when we put him in his cot and we don't know why. I chanaged the sheets and turned the mattress but still no help. Any ideas I am desperate!!