I think it started with seasonal allergies. However it was very mild with just a tickly throat at night for a couple of days. Then I got a major undeserved sideswipe from the village psycho and within 2 hours of that particular nasty little incident my voice folded.
Try gargling with apple cidar vinegar--it's an astringent. Unless, like me, you're a little bit allergic to it. (I STILL love it in salads and stuff--just have it eat it slowly and with small bites of food.)
I've heard of using ACV for gargling. Do you dilute it? What ratio?
DOn't dilute--straight, a teaspoon at a time, not TOO much because you want to kill the germs, not strip your throat dry. I have tried throat coat, but mostly that's recommended for vocalists who have a singing engagement.