'Normal' Meltdowns?

Hi there, just joined up to this chatline main topic of course being our son Joseph who is now 6 1/2.  Still waiting for the 'official' diagnosis from CAHMS, but all his doctors, school and family members have already registered him with Asperger's Syndrome.

He sums the stereotypical image of an Asperkid to a tee, but about 2 weeks ago things seem to have very suddenly changed and we are truly at our wit's end  !

His repetition (verbal and physical) is out of control, he insists he can - and has to - do EVERYTHING, from getting himself dressed completely individually; to shutting his car door and strapping himself in at precisely the same time; to opening someone else's clothes draw to get their clothes out for them.  It's like talking to a brickwall with hysterical tears; then suddenly like a short circuit - he's back to 'normal' Joesie.  This is brand new for us and we really don't know what to do, other than crying in our own room so he can't see.

Is there anyway to help this? How do you reprimand a child like this as we know it's not tantrums?

Thank you xxx