I"ve got stage fright. Badly

Yes it's true. The musical is in approximately 47 hours and 26 min. And I'm starting to ask myself what the heck I got into.Yes, I was not nervous when I auditioned three months ago, but now I am nervous beyond belief. This is worse then the nerves I got for my 8 years of dance recitals ( and trust me, those were HUGE nerves) Please pray that I somehow manage to get through this. Somehow. Pretty please? PLEASE,I'M BEGGING YOU!!!!