Giving speeches before groups can be terrifying. A very low dose of prescribed valium would help. Try it first to make sure it doesn't put you to sleep or slow your wits.
Should you find yourself giving more and presentations, which is what real life becomes, you'll need to conquer this fear.
I took Dale Carnegie training and learned to enjoy the experience. I found that by:
(1) Being completely prepared
(2) Having props, including a talk sheet, so I wouldn't get lost
(3) Standing in the room at the podium beforehand
(4) And liking the audience
I didn't get the shakes.