Feeling depressed and agitated is surely not good. I can understand it must be painful for you. But I feel you need to consult a counsellor who can help you fight away your negative thoughts.
Next Steps
In addition to counselling, homeopathic treatment too can help. You also need a diet and lifestyle prescription after proper case taking. If your complaints are severe you may need a medical consultation.
Health Tips
Try practising regular exercises, yoga and meditation.