If you are the primary caregiver, are there others around who can give you some relief? Church, family, friends? Someone to watch your parents for a few hours here or there, preferably on a regular basis, so you get some down time?
And I always found this helpful, because in the course of conversations with my relatives who had dementia, I made a lot of these mistakes all the time. Knowing I didn't have to be 100% honest actually reduced the stress levels for both of us.
Those are just the big issues that "I" dealt with, but I know that everyone has unique circumstances.
Also, local government offices on aging, local health departments, and local assisted living/nursing homes may have community resources that can help. And their doctors should have some resource information as well.