Work already finished

Today, at last, was the day: the day in which I have already finished all the work related to this subject and the only thing I have to care about is to improve all the documents I have already sent. Although the subject hasn't finished yet, I feel I have been able to solve the most difficult problems, but there is still something I am scared of; the presentation in front of a very big audience. I hope I am able to apply all I have learnt of this subject!