From what you have expressed it seems that you are going through a very difficult phase, feeling low, loss of appetite, feelings of hopelessness, worthlessness, helplessness and death wish are all signs of depression, and it seems you are struggling since a while. Don't feel you are alone, many people go through similar experiences, with proper treatment you will regain your happy life back. Along with the above symptoms you are also experiencing auditory hallucinations, it is adviced that you seek professional help.
Next Steps
Consult a Clinical Psychologist.