Hello,
As per information provided by you.. ...(.decrease concentration , loss of feelings, irritable all the time and also Suicidal & homicidal thoughts .)...you do require help from any Mental health expert like psychiatrist / psychologist to find out the predisposing/ perpetuating factors for your current situation and also to reach a diagnosis(Depression?) for proper Management...I would advise you to consult to avoid further deterioration of your health...feel free to discuss any further queries ..
Regards
Dr Srikant Sharma
Anandam Psychiatry Centre
East Patel Nagar
New Delhi
Next Steps
consult a mental health expert