I don't know where to start, really. I am absolutely desperate 
My DS (7) has AS and exhibits extremely challenging behaviour a lot of the time. I have had hideous days and weeks in the past, but today I am at my absolute wit's end. I can't stop crying. He is just so, so difficult and uncontrollable. I feel I have exhausted every option there is with him - he so much support and input froma loving gdamily, a great specialist unit within a school and oputside professionals - and yet nothing works, nothing changes and all I get is constant defiance and abuse from him. I feel devastated, to be honest. I see this bright, funny little boy just pissing his life away by being completely unable to co-operate with anyone or anything on any level. And I feel like my life is fucked, too. I feel so isolated, I can hardly begin to describe.
Where have I gone so, so wrong? 
I have had to call my mum just now and beg her to take him away for a few hours. I feela complete failure. I am sitting here in floods of tears and feel like running away.
I don't even know what I am asking for.