Looking for some tips/advice. DS is 18 months and has not been great with sleep for some time. He's obviously had bouts of teething and colds etc or development stages but now it feels like it's become a habit. We co slept with DD1 around this stage but she would come into our bed and settle easily whereas he will thrash around, hit me over the head, jump on me, throw his head around and just get worked up. After a particularly bad night last night, he woke up at 4 and we just couldn't settle him so we left him to cry. I checked in on him and put some books in his cot and he went off and woke up at 7.45. He's so much happier today and full of life whereas often he is worn out and looks so dark under the eyes and obviously it's not good for any of us not getting any sleep. He shouts and hollers so loudly my DD wakes up so then she's irritable and tired too so we're stuck in a bit of an endless cycle with it all. So my question is, how do we take this forward? I don't know anything about sleep training but I'm guessing as he's never self soothed this is what we need to do. It was ok leaving him for a little while this morning but I'm worried at bedtime he might go bananas for hours so any advice would be welcomed