It's a hard time!

Before the subscription of my thesis, my boss wants me to make a presentation to all the teachers, and get their comments on whether my thesis has reached the requirement of a Ph.D, i have revised my thesis for more than 10 times, but i still are not confident, not because of my thesis, but because the opinion on me of my boss, he still thinks that i cannot make any new creative work, so i have to revise my thesis and PPT all day, this work is sure to continue to tomorrow's presentation!
It's a hard time before the dawn!