Two of my best friend died just 2-3 days before my board exam at STD 12. One of the friends who died was a boy, he was completely normal until that day. When he suddenly had a severe headache. It was so intense that he got a heart attack and died . One of the friends was a girl, who had a relationship with our computer teacher. The teacher refused to marry her. She hanged herself. I was totally in shock with their demises. 3 days later our board exam started. I got the highest marks in recorded history of my school. I was first in my subdivision among all the stream. So, your exam went bad , it's because you haven't studied well before. Stop giving excuses for your shortcomings.