I have a weird burnt smell coming from my lungs while I exhale, and at that point the mucus also smells weird. It doesn't happen regularly but it does occur intermittently. And also I'm having breathing problem sometimes specially while working. Also I'm on medications like bilastine and montelukast and abphylline for respiratory problems cause the gp said its due to allergies. But the medications make my breathing problem somewhat manageable but not completely curable. Also inhaler won't help much. My mucus is whitish and sometimes solid mucus comes up. Pls help