Hello, Mulan.

Depression does not always present as continuous sadness. Uncontrolled thoughts, fatigue, emptiness, lack of motivation - all these and more can be signs of depression.

If I understand correctly, your "sleep latency" (the time it takes for you to fully get to sleep) is longer on the weekdays than on the weekend, and that in general you get better sleep on the weekend. Is this correct?

If so, then the stresses you feel during the work week may be interfering with your sleep. That in turn makes you more tired and stressed on top of being depressed.

Is there anything you think you could do to get better sleep during the week?