Fear of exams

To make my future bright
I have to study all night
Still when I feel a lot of fear
walking towards hall, having eye with tear
And as tensed environment is there
Making me feel stressed, but going nowhere
Sitting on chair, with shivering hand
knowledge flying out of my mind like sand
Giving myself a pat, not to worry at all
Panic attack made me shiver so wrapped a shawl
As I never failed any exam in life
still feeling on my throat, a knife