"Most of us don’t need science to tell us that sleep and emotion are closely linked.  Spend a couple nights with interrupted sleep or talk to any parent of a newborn and the connection is quite clear....If sleep problems persist, or if they are extreme, see a doctor.  Sleep disturbance can be a sign of physical problems.  Breaking the cycle between sleep disturbance and intense emotion can help you to improve all areas of your life."  Christy Matta, MA
To learn more:  Sleep and Emotional Vulnerability, Sleep Deprivation