Laryngitis

The word laryngitis means inflammation of the larynx. If your larynx is inflamed, at some point it should become not-inflamed. You and your doctor would need to determine when that point is.

Whispering is much different than yelling. In a true whisper, the airway is narrowed and airflows turbulent leak through this narrow point. This generates white noise which we hear as a whisper. Consequently there is no movement of the edges of the vocal cord. This is in strong contrast to a yell where the vocal cords are hitting each other rather aggressively. There is an in-between sound called a stage whisper where the vocal cords are partially closed and partially allowed to vibrate. There is both a white noise quality and a pitch quality to a stage whisper.