How can a patient with a history of pulmonary tuberculosis and an allergy to polyline grains gain weight?

Hello doctor,

I have not gained weight in the last six to eight years. Eight years back, I had a medical history of pulmonary tuberculosis and a collapse of the lower left lobe of the lungs. I have been under anti-tubercular drugs and breastfeeding for two months. I am allergic to polyline grain and Oflox. What could be the reason for not gaining weight? Kindly help by suggesting me a solution.

Thank you doctor for the reply,

I do not have a cough, chest pain, or breathing difficulties, but sometimes I get tired and can feel my heartbeat. I had done my thyroid tests three to four years back, which was normal then. But I do not have the reports now. I have not undergone any tests recently.

Thank you doctor for the reply,

I have taken an X-ray a month back, and I do not have the X-ray film. I used to eat two chapatis (flat bread) for breakfast, three chapatis for lunch, and two chappatis with curry for dinner. I do not experience much hunger these days. At times I feel too hungry, and if I start eating, I would be able to eat only two chapatis, and not more than that. I am a staff nurse by profession.