I'm not sqad but I'd suggest gargling with warm salty water...then spit it out.
And gargling with soluble aspirin dissolved in warm water and swallow it. (keep track of how many you take, though)
Good luck
If you voice is hoarse....then I agree with 237SJ in addition speak normally and don't whisper. Also inhale steam from hot water under a towel with the addition to the water of menthol and eucalyptus crystals.
If your voice is normal then it's NOT laryngitis then follow the advice of ladyalex.