Being in a state of grief feels kind of like being a small child, or maybe more like a very old person.
The fence posts in your day are reduced to the basics: bath time, oh it's snack time now I'm exhausted. Lunch time, maybe a cup of tea. Phone calls and visits from those with more energy and mobility than you. Time for a nap. Time to get up and put together a simple dinner for one: some soup maybe, some bread or a small sandwich.