I can understand the distress you are through. Don't worry whatever problem it is it is completely curable. Generally, premature ejaculation, loss of interest in sex, poor concentration, lethargy can happen due to excessive masturbation. It can also be addictive and drain away most of our energy and time. With proper instructions and if required medication, it can be completely controlled. For a doctor, a detailed knowledge about the the problem and history is required.