Напишите небольшое рассказ. exciting moment in school (ответить в нем на вопросы: что случилось? как ты себя чувствовал? )

Yesterday we should have two final test, one of them was in chemistry. I hate it, i don't understand the purpose of learning it.
I expected this test not to be, i had butterflies in my stomach (если что - это идиома), i couldn't concentrate.
Thanks God the lesson was delayed - the teacher had got ill. It was a narrow escape!
Удачи, бро! :)