DS2 has always been brilliant about going to bed, whether for naps or at night, but for the last 3 days he's screamed as though pins were being stuck in him every time I've so much as carried him towards his cot. Tonight DS1 (4 yrs) and I spent an hour with him IN the cot before bedtime, playing and reading to try to convince him that it's an OK place to be. He only howled for 10 minutes after we left, but I reckon that's because he was sooo pooped after refusing to nap today. Last night he woke in the night when dh put his nose round the door at 4am and screamed for 1 hour until dh went to bed with him on the sofa bed
. It's really out of character - any ideas? Sleep is critically important in our house at the moment as ds3 is 2 months old (ds2 wasn't very impressed when we brought the baby home, but didn't develop sleep problems then, and now pretty much ignores the baby).