Hi. From whatever you have mentioned, it seems that you are suffering from symptoms of depression and anxiety. Negative thinking, anxiety, irritability, lack of concentration are all symptoms of depressive disorder. You should consult a psychiatrist and get yourself evaluated completely. Treatment with medications and psychotherapy will help you get better.
Next Steps
Seek a psychiatric consultation.
Health Tips
Start exercising daily. Start writing diary daily in order to vent your feelings and emotions.