Dorn unfortunately no one cares for the caregiver. You have to decide your limits and learn to delegate. Trust others to help and to give you the time out you need. With the traditional agency supposedly they are screened before coming to your home. No fingerprints or criminal backgrounds are looked into.
Medical checkups are about the only thing done.
You need to ask to references and really check them. Its not easy. I am lucky enough to have a job that I can take off from as needed. Most places would not allow this. You find yourself always waiting for a HA who is late or just doesn't show up.