Yes, this is the worst. I have this a lot, I have had a depressive episode for weeks now but I kicked the lethargy today, I have finally done stuff. It feels so amazing to have achieved something. A shower is like nectar from the gods, leaving the house makes me feel fresh in the wintry breeze, I opened the curtains for the first time in weeks, took the rubbish out like a champ,put laundry away like a domestic goddess, listed unwanted clutter online so someone else can pick it up and get use from it (eco-warrior), Christmas tree is now up and adorned, tidied up and felt like the house now belonged in an interior design magazine...and now it's 3am and I know I have partially wrecked tomorrow, but at least I did something.
You'll get there. Everyone's like that on a day off. The night before a day off is better than the actual day off. I always do fuck all, I am sloth.
Anything worth doing is worth doing poorly, you may have done something small today, it may have been not as good as usual, but at least you did it.