HELP! I'm battling a mild cold, I have to sing tomorrow and I sound like a baritone. What can I do?

Yeah, I'm a music major and my theory Doctor said Throat coat was good, but that tends to be expencive... But, he stresses WATER "Drink water till ur pee turns pail." Try taking a deconjestent to help you dry you up. And, maybe, a non drosy cough syrup. How long have you had this again? You can email me if need be??? Oh and everything that u r dong now is good also, but whatever you do try to limit how much sugar to take in. Because, it earitates the vocal chords.