There's another part to separating things you can control (or do something about) from things you can't: Timing.

It's common for people with chronic conditions/illnesses to experience normal everyday things piling up and losing control over them. Housekeeping, home maintenance, errands... Listmaking & prioritizing (organizing) can help a lot, but I can still find myself fretting/worrying/freaking out about getting things (that need to be done) done. When I find that happening, and interfering with functioning (or sleep), I (try to) stop and ask myself, can I do anything about this RIGHT NOW - this very second?

If I can, then doing something - anything - helps. If I can't do anything right then (like if I'm in a doctor's office, at some social engagement*, or more likely, lying in bed trying to get some SLEEP! ) then I can't do anything right then. It's out of my control right then, so I let it go until I can do something (about it).

* Socializing, keeping social engagements, are important to people with chronic conditions - maybe even moreso than for normies, because it can be so hard for us to get them in the first place, and then to keep them dependably/reliably. We cannot allow ourselves to become isolated/shut-ins/hermits - even if it occasionally means letting something else slide. We (humans) are social creatures, and we need social interaction for our physical (as well as emotional/psychological) health & well-being.

Doc