The first thing I would focus on is GABA levels or activity.  GABA functions as both a neurotransmitter and a neurotransmitter inhibitor, so it has kind of a balancing effect on the nervous system.  If you can GABA I recommend 750mg 3 times daily at least 30 minutes before meals.  I have seen it work for other similar disorders.

The herb ashwagandha also stimulates the GABA receptors, so this is an alternative if you cannot find the GABA itself in the 750mg strength.  Although ashwagandha will not be quite as strong.

Another suggestion is 5-hydroxytryptophan (5-HTP), which is a precursor for serotonin.  I have seen some research in the past showing a possible link to low serotonin to Aspberger's, OCD and some other conditions.  The 5-HTP comes in 50mg and 100gm strengths.  I would start with the 50s, 3 times daily at least 30 minutes before meals.

I believe you said you were also on the TMG, which I would also stick with.  As a methyl donor this will help with the serotonin production.

Hv