Hi
There are many reasons behind depression and Depressive Moods and it could be biological, emotional, environmental or social factors and you are also physically not in well shape as you mentioned.
Next Steps
Try to give yourself space, time and importance to gain clarity and insights about situation and conditions or connect with psychologist for this treatable issue.
Health Tips
Analyse and monitor parameters of physical and mental well-being and engage yourself in different activities which you enjoy most.