Why Was My Singing Fantastic One Day, Then Horrible The Next?

I've noticed this and am sick of it! I was a great singer, beautiful, strong voice. I never scream and I'm just a kid, so no, I don't smoke or anything. My voice is the same, its never changed. Then, in a week, I got really sick with a cold. My voice had changed into a raspy voice. I knew the only reason it had changed was because of the cold. I still gave my best effort to sing. The cold was long gone and I didn't cough or was congested or had that raspy voice anymore. After having that cold and even thought the raspy voice is gone, I can't sing. Ever since I caught it, my singing voice just - disappeared. What can I do to get it back? I really REALLY want to sing again!