I'm sorry you're going through this.
Sometimes you just force yourself to do something whether you want to or not, especially when it comes to housework.
My son is a mountain bike racer and competed in the top race in the country this year. The man who started this race which is the hardest race in the country has a couple of sayings that have inspired me to force myself to do things when I don't feel like it as I have some chronic health issues. The saying are 'you're better than you think you are,' 'you can do more than you think you can' and 'dig deep.' If I don't feel like doing something I know I need to do, I 'dig deep' and force myself to do it. And believe it or not, most of the time I feel better once I get started.
Here's a clip about the race: