Yes, as you described it, it certainly does sound like it. I've known two people that suffered from it. I worked with one person for two years. It was NOT pretty. They would "fall asleep" at the strangest times, and they wern't faking, or trying to avoid anything.
Both of the men I knew, after waking up, would realize that they'd "done it again." Their reactions were usually the intial embarrasment that moved to fear that they had hurt someone while they were "out".
In both cases, driving was a serious problem. Their spouses did all the driving in the family. So I would suggest that medical help is clearly indicated. Hope this helps. Bob