Final answer:
Jennifer is likely diagnosed with Bipolar disorders, as her symptoms indicate periods of depression and episodes of high energy typical of bipolar disorder. Bipolar disorder involves severe mood swings impacting daily functioning and requires professional treatment.
Step-by-step explanation:
Based on the described symptoms of experiencing very sad days, tiredness, and periods of high energy, Jennifer is likely diagnosed with Bipolar disorders. Bipolar disorder, previously known as manic depression, is characterized by alternating episodes of depression and mania/hypomania. During depressive episodes, individuals may feel overwhelming sadness, fatigue, and a loss of interest in activities, while manic episodes can involve high energy levels, reduced need for sleep, and unusually heightened mood.
The mood shifts associated with Bipolar disorders can significantly impact a person's daily life and ability to function. It's different from the typical ups and downs that everyone goes through - the symptoms of bipolar disorder are more severe. As such, this disorder requires proper medical diagnosis and treatment, often involving a combination of medication and psychotherapy.