Wish I had the answer - I don't - I struggle with it too. But I wanted to let you now you are not alone in this!
for me, I am able to do work things (am self employed so I have to do the work or it all falls apart, and I'm a health professional on call, so if something comes up that is urgent I have no choice but to DO it.
However - I struggle to do anything around the house. I have had a pile of dirty dishes on my bench for 4 weeks and counting. Might be up to 5 weeks no. Last week I did manage to rinse them (starting to smell - :-0 ), but just cannot 'do' them. My washing goes form me, to wishing machine, to hanger, to the floor, back to me. never fold it , never put it away. I have not vacuumed for a couple of months. I haven't walked the poor dogs for days. I don't even open the curtain in some rooms. I don't open the mail. I don't do taxes, pay bills until the very very last moment.
(setting up direct debits helps with that though! Maybe you could have some bills set up so the money just goes straight out of your account every month?)
What I think it is all about is - it's about validating what I'm gong through in a funny kind of way. In my work role, I need to 'be ok and keep functioning, and appear to have it all together' - but when I'm at him,e its like the part of me that is suffering, hurting, and struggling with PTSD, needs an outlet of sorts - so that my house is in such a mess, in some ways validates that part.
At the end of the day - what is the worst thing that 'could' happen? If my dishes don't get done, and say they start to grow mould - i can always throw them out, get paper plates. clothes not being folded away - who cares? Luckily, I live alone, so if I am ok with the mess, no one else is worried either. Are, I'd LIKE to live in a tidy house, but in some ways, it provides comfort having it messy, cos its my mess. It .. feels safe.
Could you hire someone to help out, doing paperwork? even a couple hours a day or a week?