Hi sir I have the problem of low mood disorder,feelings of sadness, helplessness, worthlessness,anger,voice vibrating from brain, irritability a feeling of  danger lack of energy extreme mood swings thoughts of hurting myself and others being unable to carry out day-to-day activities hearing voices in your head I had done test like thyroid, GTT, heart X-ray but results are negative I'm thinking that I had chemical imbalance in brain Which doctor to consult please help me alcohol or drug misuse an inability to concentrate