Oh you poor thing! I could have written that post- in fact I just blogged my woes not 20 minutes before reading your post. I know exactly how you feel right now. And all I can say is- it wasn't your fault!
We are currently coming to terms with the fact that we may now have 2 special needs children
The uncertainty is awful, in fact it's by far the worst thing. If someone could tell you *this is what is wrong, and this is the outlook for your child* you'd have something... But the world of delayed development, especially where there is another child already with special needs, is a scary and sometimes despairing world.
PM me if you ever need a chat.