butterflies in my stomach

Yesterday was just like any other day for me,it was suppose to be a normal day with no stress,but here i am at the moment feeling all the anxiety in the world,am going to sing in front of a crowd tomorrow,i really cannot believe it,it is amazing how you don't plan for things and they just happen,well to tomorrow is the day,i get to sing in front of people for twenty minutes!

The butterflies is my stomach wont just let me breath ,i feel so scared!.........................somebody please help me before i faint.lol