Hi Mike,
I can very much relate to what you are talking about here.
In the DN myself, just came off retreat two weeks ago and practicing quite a bit in daily life now (I work at home so try to sit at least 2 hours a day),
and the irritability can get to astounding high levels.. sometimes it just feels impossible to sit still while at the cinema or in cramped places, my lovely girlfriend's touch at times can cause me so much anger, for no real good apparent reason.
Are you practicing nowadays? I heard stream-entry solves this, temporarily

Touches of equanimity help but are impermanent at the moment.