Pretty Much There Already

From here:

Caregiver burnout is something you may not notice, but people you know may notice changes in you and express their concern. Here are some signs of caregiver burnout:

Being on the verge of tears or crying a lot
Feeling helpless or hopeless
Overreacting to minor nuisances
Feeling constantly exhausted
Losing interest in work
Decrease in productivity of work
Withdrawing from social contacts
Increasing use of alcohol or stimulants
Nervous habits such as chain smoking
Change in eating patterns
Change in sleeping patterns
Increasing use of medications for sleeplessness, anxiety, depression
Inability to relax
Scattered thinking
Feeling increasingly resentful
Being short-tempered with care recipient frequently
Increasing thoughts of death