question: i was recently diagnosed with pneumonia. i had pneumonia when i was a baby but never since. i was shocked when i heard the diagnosis. the symptoms became apparent on march 28. i began taking doxycycline monohydrate on monday april 3 and must take them for seven days. i am mega healthy and have not been sick in years. i can t even remember the last time i was sick. this has really knocked me out. i have zero energy and very little appetite. how does pneumonia manifest in the lung and how does bacteria get in there? how long will it be until i recover? i am really having a hard time with this. help!