Mediastinal Lymphadenopathy.

To diagnose the symptoms such as weight loss, daily fever in the evening and joint pains, I underwent CECT of chest. CECT has diagnosed me with mediastinal lymphadenopathy with discrete conglomerate enlarged lymph nodes in prevascular, right paratracheal, subcarinal, aortopulmonary window, and bilateral hilar region. Presently I am being treated empirically for Tuberculosis since 07.08.2018 but I have not got relief from that. Fever comes daily around 5pm and ranges between 100°F to 101°F. Weight loss has stopped at a point (55 kg) but no further weight gain beyond that (I am still at 55 Kg ever since the beginning of ATT. My normal weight was 62 kg before felling ill). I have read somewhere that enlarged lymph nodes may also be due to some malignancy. Has the time come (6 weeks after the start of ATT) to explore other possibilities other than the Tuberculosis? Or should I give more time to the ongoing course of treatment