You have to rest your vocal chords. Do not talk, if you can help it. Write on a notepad to communicate. Drink lots of warm fluids or citrus juices. If your voice isn't normal in a few days, see a doctor.
Don't talk very much rest it. You can also drink hot tea with lemon. Drink plenty of fluids to moisten the throat. Also what is good is to suck on hard candies such as lemon drops.
Rest. drink lots of fluids which will help soothe the vocal chords. get a good nices sleep. do not eat things that will irritate your throat when swollowing. aka brocolli and high fiber foods.