Dejection - Hardwork Gone in Vain

I lent a book from the library,
And took down notes in a hurry.
I studied each lesson thrice.
All these are true, and not lies.
I avoided listening to music,
And continued to study despite falling sick.
In studies did I invest all my time.
I would like to know if this is a heinous crime.
I got myself new stationery,
I wanted my performance to be extraordinary.
My family and friends wished me 'All the best'
As I was going to write my semester test.
'I worked this hard' to not leave the paper empty.
But the invigilator received the cup of tea!!