LOL, yep. Live it daily. I used to get an email newsletter... gosh, can't remember the name of it but I bet if you do a google on "caregiver" you'll find lots of info. Basically the newsletter had hints, tips, resources, and reinforced that caregivers have to take care of themselves too... which is a great idea in a perfect world, but when you don't have anyone to take care of the person you're caregiving, it's kind of a Catch-22.
The physical and emotional toll of caregiving can be a bear. Seems to have a cumulative effect too.