Star, you are quite right, im far from level headed at the moment! As i said before the continous pressure, add to that lack of sleep, the strain is starting to show, I need a break 
Keep, i used the term mental breakdown on here to describe his behaviour, it was a lot shorter, than describing all of his behaviours, every time. More me being lazy and not wanting to type the whole thing! Mental breakdown to give you some idea of just how low ds was. I have never seen him like that before.
"To DS1 if he does not have to do something right now the pressure is immediately removed - his state of mind/level of stress is related to his day to day lived experience - what happened today - rather than an imagined future - what may happen tomorrow. That's what I mean by 'brooding'"
To ds that is how it used to be right up until June, remove and level of stress falls immediately.
However after i returned ds in September his level of anxiety and self harming really escalated. He started scratching again, but he also started to hurt himself in other ways, that he never did before and had thoughts of wanting to die etc (although he never told anyone about this in September)
By October, he started to tell me what he was doing, ie cutting himself with scissors in the bathroom (he was already smothered in cuts from scratching), hitting himself with my hairbrush in the bathroom etc (i contact CAMHS to chase up referral that was made in June, got told it got lost, got my GP to fax another copy etc)
SW then interviews him in school, he shows her injuries, tells her the same thing and A&E.
Following this, ds had his 'mental breakdown' he was withdrawn, not wanting to interact, shutting himself in his room, lining things up, breaking down in tears all the time, not eating, not sleeping, not wanting to leave the house, and self harming anytime school was mentioned.
November his mood wasnt lifting as it normal did, i had never seen ds like this before. I took him GP, GP agreed sign him off from school until CAMHS assessment finished and plan in place.
I told ds he wouldnt have to return to school until the adults had sorted this out. Mood lifted, he started to get back to 'normal' again.
Now ds is his happy 'normal' self again and the only time he displays any of the other behaviours is if a return to school is mentioned by outside proffessionals. ie social worker, EWO etc during home visits.