My DS (now 15 months) was a brilliant sleeper - I've never had any issues with getting him to self settle in his cot. Within minutes of being put down, he was asleep (assuming that it was nap/bedtime) but now he just doesn't settle even though I can see he is tired (i.e. rubbing his eyes etc). He just cries and cries, sometimes for up to 2 hours and I don't know what to do. I think my DP and I have created a rod for our own back. He started nursery a couple of months ago and was pretty unsettled in general after that and I think we've just made it worse by responding to him, going in, shushing him, patting him, picking him up, offering him the breast again. Would you do controlled crying if you were in my shoes? I really don't want to leave him to cry but I just don't see how we can improve the situation without it. Please help - I feel like a total failure and I know we've brought it on ourselves. 