Diary or Diarrhea?

Firstly , congratulation for my first diary in English.The strong purpose to do this is to practice writing English ,which is the hardest part in my IELTS exam.
Diary means wrinting something to express your emotions , thinkings and miscellaneous.That can't only reflect on yourself but also release your pressure. However,it's quite difficult to continue keeping this habbit.That require enormous patient and stamina (guts) .
Diarrhea is the word to keep passing water stool .Here i just use for express my bad mood which is non-stoping.I know that's a strange example ,but i cant's find the other suitable vecaburary.
To describe so much boring sentense,I just can't sleep . Cheers!!!