To get your voice back, rest well to give your vocals a rest too without communicating verbally. Drink fluids like tea mixed with honey to keep your voice box well hydrated. Stay away from irritants that you can inhale like smoke and breath deeper when taking a hot shower. This is for the system to help with your vocal chords. Read more details at http://www.wikihow.com/Get-Your-Voice-Back.
I usually find mine under the couch, but you can find yours with tea with honey, warm milk, cough drops, gurgling warm water with salt in it, and be sure to avoid spicy and acidic foods for a while. (I have tried all of them, they all work)