I hope I'm posting this in the right thread. I need some advice or thoughts regarding a difficult situation I have at hand.

Here's the story:

Background: I am married and have 2 children to a man that has fully fledged pathological narcissistic personality disorder. The kids are now 20 and 15. Life with my H has always been exceptionally difficult and the domestic scene has been completely dysfunction and abusive since I can remember. I have posts from over a year ago, when I had my lightbulb moment, that speak about the insanity of living with a disordered person.

My son is the 15 year old and at present is struggling with ?? depression and perhaps some other things - although I'm no expert on how depression can present itself. He seemed to be a fairly happy-go-lucky kid until puberty hit (11 years old) and from then until now he has become more withdrawn and for the past 2 years has been on a steady decline in terms of behaviour.

To summarise how he presents:
* he is very uncommunicative and withdrawn and spends most of his time on his computer - so in other words he is very disengaged from life.
* he is defiantly stubborn and refuses to do anything that is asked of him - even simple things. This began as an active defiance in response to his over-controlling NPD father, but has now evolved to include anything, anyone asks of him. He does what he wants, when he wants.
* he engages in compulsive masturbation and spends 2-3 hours every evening locked in the bathroom self-soothing himself.
* over the past 18 months he has had many anger outbursts which involved him bashing furniture, throwing things and either storming out of the house or locking himself in a bathroom. There have been interventions because of this because his safety was of concern. He appears to have got some of this anger under control now, but still has a "short fuse" and is easily angered and prone to losing it.
* for the best part of this year his sleep/wake cycle has been totally off. At first I thought it was because he was doing all-nighters on his computer, but that has since been out ruled. He has been known to sleep for 16 hours non-stop and has enormous difficult waking up in the morning. So much so, that he has missed an extraordinary amount of school because he simply can not wake up. He still struggles with this right now and has missed 3 weeks of school because of this.

He has been seeing a therapist and psychiatrist and was put on anti-depressants and melatonin to assist in regulating his sleep/wake cycle. Initially, the anti-depressants appeared to work, but their affect then wore off and he "crashed" again. He is now on a higher does of anti-depressants (as per his request) and taking melatonin (as per his request) and taking vitamins/minerals (as per his request).

He is unable to articulate or explain what is going on for him, but is genuinely wanting to find answers. He loves school and want's to go. Every evening he prepares himself and speaks as if he is going, but come morning his inertia paralyses him.

The psychiatrist has now ordered a blood test to check for a wide variety of things, along with an EEG (preferably a sleep deprived one) and an MRI of his brain.

I'm at a loss as to know what is happening. Is it depression? Depression plus something else? Or something else all together?

Has anyone got any ideas whatsoever?

Thanks in advance to anyone who takes the trouble to read this and reply.
Jannaku x