No you most definitely are not the only one who procrastinates. Pretty much on every one of my report cards, elementary through to high school, teachers always commented on how I needed to stop procrastinating. Skip ahead 33 yrs and nothing has changed. Well one thing has changed. I've finally just accepted that I'm a last minute kinda gal.
Advice about your speech? Other than jotting down some memorable, funny, and poignant memories that you may want to speak on, just talk from the heart. Once you get going, it will come easily.
Now you can just relax and chill and stop worrying about writing out a stuffy speech.