Ghyslaine, I don't think you should go back to work until you are completely recovered, and that means when you can work a normal day and not be exhausted. Be sure to get the pneumonia shot after you are recovered also. I have asthma and I had pneumonia twice in the last couple of years. When I had asthma without a cold, I wheezed and whistled when I exhaled. I don't always have it, but the pneumonia caused permanent scarring to my lungs. That's why I'm not teaching any more. That's why I'm urging you to take this seriously. That might even mean your job could be in jeopardy; I know that. It's better than becoming an invalid at a young age. Do what's necessary for your health.