Will my voice condition become permanent? how do I get better?

Hi. I'm a kindergarten teacher which means I use my voice a lot professionally. I also talk a lot as a matter of course. I started losing my voice last Saturday when I began to cough a lot. Knowing I was getting sick I took all the necessary precautions - rested, dressed very warmly, drank lots of fluids .... but I just got sicker. By Monday my voice was almost completely gone and I had to have help in the clroom. On Tuesday I had no voice at all, so I took the day off and on Wednesday it seemed better, so I went to work used it and by the end of the day I had no voice again! I have been drinking copious amounts of warm and room temperature liquids, inhaling steam, drinking stuff with honey in it, eating lots of fruit, resting a great deal (I even took Thurs and Fri off work!!), writing notes instead of talking at all - cause I read that whispering makes it worse, sitting in hot rooms ..... - basically absolutely everything I can think of! - and yet, despite everything, my condition seems to be getting worse not better!! I need my voice back to teach and I'm scared this might become permanent! What more can I do? Please help!