Kel,
Been there. Hated it. Rinse and spit was impossible when toothbrushing!
I'd call the neuro. Even if it has happened before, it could still be something different. The first thing that comes to my mind is TIA/stroke, but if there's no other symptoms to go along with it, I'd call the neuro rather than my regular doc, because when your other symptoms are taken into consideration, it may be a flare...48 hours or more, call.