I am a coward!

I am in a dillema! This year, like every year my conservatory is going to have a concert with the best students. I am participating to those concerts for the last four years. This year it is going to take place in a different place and i feel like i am not as prepared as i would like. This is also the first year that a professor of mine, a very vain professor of mine i might add, is going to join us with his choir. Since i am singing solo i have to be great, no mistakes can happen.
These are all excuses.. I am scared. I get the worst case of stage frights and this is the pure and honest truth. I know exposure is the only way to fight it, but goddess help me i cant! I love music, i love singing but i am a coward( i know this is not very wiccan of me, but this is how i feel). The stage, the lights, and the audience, they sum up my darkest of fears. Maybe all i need is a bit of supernatural help. If you have any ideas for herbs, spells,potions i could use i would love to hear them.
By the way, iwant to say a big thank you and lots of love to solitairy phoenix. Reading your post made me understand that i have to stop postponing it and face my fears. Brightest blessings to you all!