popsycal, agree that don't know how you have maintained your sanity....you poor things.
look, is cc out of the question.
very very early on, i read a thing on mn and i might be worng but i think it was cod (!) saying, look, so what if you can't hear them crying, if they are well, and they are safe, they need to sleep. now that might not have been cod, but it was someone and although it sounded really harsh what it did do was make me realise that we all needed to sleep more and that ds wasn't ill or unsafe and just needed to learn somehow that he could wake up, could go back to sleep himself and could survive that.
i know i'll be slated for this, but i do think that whilst drugs are definitely to be used as a last resort, that they really should be the last resort.
how long is the longest time you've ever left him to cry.
he is 15 months now, and so i really think that you both (both you and him) need to believe that waking, crying head off, falling back asleep, is surviveable.
i'm sorry if i'm being useless or sounding cruel and heartless, but i honestly think there is nothing as destructive as the feelings that you can get when you are tortured by sleep deprivation.