I can appreciate your concerns.
in view of recurring fever for last 6 weeks, ? pneumonia ,? pus in genitalia the boy definitely needs
detailed examination & investigations. TB (tuberculosis
) is a chronic infectious disease which though many times is difficult to diagnose but easily treated with 6-9 months of therapy with several medicines.
Also worth considering is possibility of some immunodeficiency
Please consider second opinion
from a senior pediatrician
& infectious disease consultant.
Your anxiety is well justified till a correct diagnosis is made.