You are treating a 35-year-old female named Candice. She divorced more than 10 years ago and since then has dated off and on, but with no serious romance. She works as an IT specialist for a telephone company and reports generally to like her job. She has no children and is not close to her family of origin. The reason for seeking counseling has to do with a variety of generally mild symptoms, but together they bother her. She has little appetite and reports feeling tired much of the time, even if she gets a good night's rest, but she often suffers from both insomnia and hypersomnia. She has very low self-esteem and even though she appears to be very good at her job and is personable, she feels like her life is going nowhere. She has never been diagnosed with a major depressive disorder and you have also ruled that out.

How would you diagnose Candice? Refer to the specific criteria in your text for your diagnosis.

What differential diagnoses are possible? In other words, what else have you ruled out that is similar and why?