My 19 year old does this too. She started just at night, but has begun doing it when half asleep during the day, too. I'll typically pick her up, slip her inside my hoodie for a few minutes to calm her down, and then she's god. She's stone deaf, and a little senile, I think, but otherwise holding up well enough to terrorize our two 70 lb dogs. (she weighs 5.5 lbs).