thanks for asking the question
i completely understand your problem
actually lungs are a 3d structure so it covers whole of the thoracic cage either front or back starting from 2 cm above the collar bone to the 9 th rib ,totally covered by ribs. posteriorly it is covered by
scapula as well.
now about
tuberculosis ,healing in tuberculosis inside the lung is same as healing of the wound on external surfaces, that means by causing
fibrosis of the wounded area .and in case of pulmonary tb ,healing takes time ,it is a chronic process.it may take months to years.when this fibrosis occurs innings ,it causes contraction of the area leading to stretching of the vessels along with the nerves supplying it ,this is thought to be the reason for pain.
and yes , no need to take treatment for tuberculosis again ,you need to get your sputum checked for afb first and if its positive then only u have to take the treatment .i don't think this is the case with you ,so don't worry have some pain killers.
thanks/regards
feel free to ask more questions
may god bless you with good health