symptoms of a depressive disorder

an usually sad mood
loss of enjoyment and interest in activities that used to be enjoyable
lack of energy and tiredness
feeling worthless or feeling guilty when they are not really at fault
thinking about death a lot or wishing to be dead
difficulty concentrating or making decisions
moving more slowly or sometimes becoming agitated and unable to settle
having sleeping difficulties or sometimes sleeping too much
loss of interest in food or sometimes eating too much;
changes in eating habits may lead to either loss of weight or putting on weight