How can I get my voice back?

I think I have laryngitis but for the past two days I have been having a scratchy throat and today when I woke up, my voice was gone. I have to whisper everything and I have been walking around with a small whiteboard in case people can't understand me and when I try to speak at a barely audible volume, I sound like a chipmunk. I had some cough drops throughout the day and I have been drinking the Theraflu tea every 4 hours like it tells me too and it makes my throat feel better but I still can't speak. I have school tomorrow and I can't just stay home so how can I get my voice back?