It's really getting to me now

I think, I am suppose to post a response to a presentation, but I can't find the presentation. I have looked and looked to a point of where I am exhausted. What is fustrating me is that the presentation might not be there, but on the other hand the presentation might be there . I just don't know. This is basically how the past three weeks have been. Searching for everthing and by the time I find where I belong, I dont have any energy left.