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

Throat coat or another lubricator is good. There are some sprays that music stores carry. In general, between now and then, don't drink milk or eat milk products. Take a decongestant regularly to try and clear up the cold ASAP. Tea is a little acidic, so don't drink too much or you can start to irritate your throat. Warm up the morning of the day you have to sing, rather than right before. Get plenty of sleep and no alcohol.