Sir,i have been into a lot of trouble for the past 4 years,i am a medical student.I am not able to concentrate on anything,i am very forgetful,i forget many things everyday,i am not able to grasp things quickly,my mind is foggy,feels like it s slowed down ,I am facing lot of difficulties in studies,i donot get things quickly into my mind,i sleep more ,I feel fatigued.. pleasel help