What Causes Sore Throat Along With Breathing Difficulty?

I teach K-8 and everybody seems to have this weird cold or virus. Except mine is much worse. Tomorrow will be a week since I started with a sore throat. I lost my voice three days ago. I ache all over with really bad sinus pressure in my head and the feeling that something is sitting on my chest making it difficult to breathe. I have a painful cough that keeps me awake and now there are sores inside of my mouth. My glands are swollen and tender to the touch. I have not, however, had any fever so it can t be strep or pneumonia. What can I do to feel better? I have no choice but to go to work tomorrow.