Congested and lost voice?

I've been congested for days now (the kind of congestion that makes it difficult to breathe and painful to cough) and now I've lost my voice. It's very raspy, hoarse, and it hurts terribly to talk. I work at a daycare so I have to be loud (we sing a lot) and I just knew I couldn't survive today. I called in and my boss said it was no problem that I miss today, and she suggested I eat a spoonful of honey. Well, I did, but it did nothing for me. What can I do to get rid of all of this? I need my air and my voice back!