This used to happen to me quite a bit, less often now. I've lost friends based on the stuff I used to do in these fugues (not sure if its technically what professionals call a fugue but close enough). In college I used to take off in the middle of class and go running off into the woods. One time in the middle of the night I climbed up a fire escape to the roof of the library. I once threatened my parents with a piece of piping in my hand. What helped me was a better understanding of my DID, lots of therapy, and some much-needed medication. Its not unheard of. It is serious though.
A little tough love: look at it from your wife's perspective. Its not unreasonable that she got scared. I have a kid alter (thats a DID/MPD term) that is sweet as can be but used to throw things when he got upset or scared. That's inappropriate for a child, but that child was in the body of a large full grown man and to my wife it was literally terrifying. These kind of issues need to take priority. Procrastinating is only increasing the chances that someone will get hurt.
Are you still seeing a T? If not, it may be time to start again. If so, make sure you relate all this to him.
Be safe and keep those you love safe.
"As long as the child within is not allowed to become aware of what happened to him or her, a part of his or her emotional life will remain frozen . . . all appeals to love, solidarity, and compassion will be useless."
-- Alice Miller