The current problem related to your weight. It has nothing to do your past TB problem. U said that your weight is 91 kg. Because of that overweight you are getting breathing difficulties during night. Need some more details like snoring, day time sleepiness, are you active with your work or feeling lazy, drowsy etc.,
If you have some of these symptoms, you .at be suffering from OSA.
Better to consult a pulmonologist for complete evaluation and management.
Next Steps
you can consult me privately.