Hugs, NuckingFutz!!! Very familiar territory there... I can only really echo what the others have said. Especially that you are definitely not alone and that accomplishing even the smallest tasks helps, because when we are feeling like that, they seem anything but small. And because they *do* feel so monumental, they get extra bonus points, right? _Yes_. Because they count so much in such times. Those little victories add up.
And remember to be gentle with yourself-- we know that that is not easy, but it is important. Keeping you in my thoughts....