Thank you for asking. I can understand the distress you are through. Although laziness, fatigue can be symptoms of depression but for diagnosis of clinical depression other symptoms of low mood, anxiety, persistent negative thoughts, etc should be present. You symptom is more suggestiive of lack of motivation than a depression. Motivation enhancement therapy or behavioral activation therapies can be very beneficial in your case. I would suggest to see a nearby Psychiatrist as he can conduct a detailed interview and establish a condition.