Took tonight off because this stupid bug has made me lose my voice. Could be worse I guess. Boss has been on a rampage this week anyway. Drinking lots of herbal tea, with ginger and honey, bah, coffee is supposed to be the wrong thing for this.
Coffee won't hurt. It's a nice warm liquid and that's what your actually need to soothe your throat. What you mainly need to do is rest your voice and speak in whispers. The vocal chords are irritated and inflamed and need time to heal. Drinking ice cold things also helps reduce the inflammation too, just alternate with the warn liquids.
I had severe throat inflammation with the flu when I was in my 20s and kept on plugging at work and wound up ripping my vocal chords to shreds. The scarring left me with an often raspy voice that becomes horrible with every irritation of my throat. Sometimes I even need to press on the side of my throat in order to speak when it gets bad enough.
Get better and take care of that voice with good care...and rest.