I am so sorry that you are going through this. I read your post and I can feel your pain. When children are in the grips of this, I think the most difficult part is not knowing if there is a light at the end of the tunnel. I know that is how I feel. I unfortunately, like the docs, have no great answers for you in respect to when it ends. However, sounds like you and yours are overdue for a goodnight's sleep. I might get some flack for this, but a pediatrician friend of mine said that every once in awhile, when it has really hit the fan, I can give my child a dose a kid's benadrill at night to help him sleep. I know this sounds like your drugging your kid, and "isn't that bad?", but as she conceded, "You must eventually sleep, if you don't get some sleep, it is only going to make the situation worse for all involved". something like that.....so when my son is just off the wall, his brother, father and I have all just had enough, I give my son Benedrill to sleep...without guilt.