Thank you, friends, for those helpful websites! (Which, of course, I did not see until now, the end of the day, as I am about to write.)
Meanwhile, today was what I think of as a "spacer"day--between what my days have been like, and what they will need to be like as time goes on.
As many of you quite rightly perceived, I cannot go on like this in a perpetual state of shock and outrage; nor can I spend my whole day on line or on the phone. So, YES: the one-most-important-thing a day is going to be really helpful. And it will be helpful, as well, to resume walking daily; it's been hit-or-miss lately.
The cats have been doing their job of taking care of me: Bracha mostly curls up by my side during the day, on the blanket-on-the-heating-pad-on-the-little-sofa. Mazal takes over at night, and curls up purring beside me with her head on my shoulder. They make sure that I return from the awful fantasies of what-if to the concrete realities: food, water, clean litter boxes, brushed fur.
In addition, today was full of treats: a friend treated me to a belated birthday lunch at the Indian restaurant and a homemade gluten-free cupcake, candle and all; I dropped in on a friend who was home (yay!) and we walked in the nearby park and listened to music and visited. The weather was beautiful, the cats were happy.
And, as the voice of my beloved has reminded me, "There is still a G-d in the world."