Answer: 
Reactive depression 
Explanation: 
Reactive depression is a psychological condition of a person. It is the form of depression. It is also called an inappropriate state of a person who suffers from depression. 
This depression is precipitated in a person during some specific events. It is caused due to stressful events in life. It is a major depressive disorder. It is characterized by hopelessness, worthlessness, and sadness. 
Thus in the above statement Sammy is suffering from reactive depression that occurs due to her stressful life event.