I think not taking it is a good idea.

You don't know that you will turn red and crumble, it is your fear.
This might be the time that you are confident about your ability to say the words you've prepared, knowing your classmates are listening supportively and knowing that it's not an easy thing for many to do.

If you take something, you will miss the experience of feeling and that may be the feeling of pride and accomplishment of a speech delivered very well.