Hi lovebugg. I'm sorry, I know very well how you feel. Sometimes I have to do these things too atnuniversity, and also if the speech is short I'm always really scared.
First of all, remember that not everybody really listens to you in class
Have you also to use power point or something similar? If so, people who wants to listen the topic will probably be 'distracted' from you talking, because they'll want to read the slides...that is a good thing
I didn't undestand well if you have to talk alone or with other people. In this case, you could explain them that you are anxious to talk in public (maybe writing a message, if you are embarrassed), so maybe they'll accept to talk a bit more than you. I did it once and the others have been supportive.
Last suggestion: drink something relaxing this evening and tomorrow morning, breth deeply and try not to worry, it will be finished soon And then buy yourself a present
Make us know how it goes