Our professor had taken a class test a week back. I was very happy about the fact that I had performed very well and expected very good marks. I got the result yesterday. It was not as good as expected earlier. I felt heartbroken as it was the second internal I have performed so badly. I cannot concentrate on anything except those marks. I am not able to concentrate on my lectures because of this. I doubt whether I am worth doing anything. What can I do to get rid of this feeling?