The passive active thoughts of not living are might be due to less serotonin levels and negative thoughts about self, others and future. But the first thing you need to go is see a psychiatrist. With some medicines in limited time with counselling with it recovery will be faster. This is a very treatable one just need to take support.
Next Steps
See a psychiatrist
Health Tips
Involve a supportive person along who is open to go near a psychiatrist, psychologist