Infectious laryngitis is a common illness that is almost always caused by a virus, but can also develop from bacterial respiratory infections. Viral laryngitis is usually a mild illness. The development of severe hoarseness and airway obstruction with respiratory distress, inspiratory stridor and air hunger is unusual.
The primary symptom of laryngitis is a lowered vocal pitch, hoarseness, or even the complete loss of voice. Because the cause of laryngitis is typically viral, antibiotics are typically of no use. If the hoarseness continues beyond 2 weeks, you should see a doctor to rule out other causes.
Don't talk if you don't need to, and use a quiet voice if you must. Carrying and using a notepad and pen for writing notes will allow you to experience further rest, and act as a good reminder to talk as little as possible.