I'm still feeling a bit worried because I'm coughing up brown phlegm even though I finished my Levofloxacin course. The chest pain I had is mostly gone, which is a relief since it was pretty uncomfortable, but I can still feel something in my lungs. Does this mean the bronchitis isn't fully cleared up? Should I be doing anything else, or might it just take a bit more time for my lungs to feel normal again?