I need some advice, I'm at my wits end. My 20 month old has always been a brilliant sleeper and gone to bed no problem at all, but over the last couple of weeks he's been TERRIBLE. He's fine when we first put him to bed for about 10 minutes, then he starts screaming his head off. I don't know what to do. I've tried ignoring him (he's not in pain or anything, definitely just being naughty) and I've tried going in and out and laying him back down but he just gets more upset. Nothing's changed with his routine. Help!