I Was Sick For A Week And Stayed Home From

I was sick for a week and stayed home from work. It started with only a slight sore throat and a lot of mucus. I would only occasionally cough. Now, 3 weeks later I feel much better and have little mucus. The top part of my lungs may be inflamed as I can feel a burning feeling. I have fatigue if I stay up late at night and sometimes I feel slightly hot.