How frustrating for you
Keep searching, you know when somethings not right - trust your gut instinct (as I'm sure you do) I used to hit my head to go to sleep when I was a child, it started after I had a stay in hospital.. that's the story - but I had an aggressive drunk bi-polar mother & an aggressive older brother (I think it was more to do with that..) since he had a rough start (poor little man) perhaps it's his way of dealing with the frustration or the memory of his previous home life?
Just a thought I had - I just remember hitting my head like that as a kid, my mother & brother were very cruel & my dad was not really that involved with me, I didn't feel loved or wanted at home & I think by banging my head it helped somehow? I was maybe 3 or 4 when it started & had no other way of expressing myself. We were also pretty isolated too.
I may be way of base, but I thought my experience might be of some use. Keep looking for answers Sin, You know when something isn't right x