When I was taking care of my dad when his mental faculties declined into the dementia death-spiral, I never asked for anything for myself. And that was a mistake. It eventually made our relationship something else. Caregiver & patient rather than daughter & father. There are no easy answers, each of us face this in our own ways.

The only advice I have for you is this: Get help. You cannot pour from an empty cup. Believe me, I tried. It need not have been that way.