I think it would be good to go see an Allergist and find out what is going on. I think it is possible you may have some allergic airway inflammation (low-level) or post nasal drainage causing this shortness of breath...in any case, you need appropriate medical exam & treatment.
Chronic Lyme Disease, Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication/Chemical Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD ("Secondary Lupus-Like Syndrome"), Osteoporosis, Pancytopenia, chronic malabsorption/malnutrition, etc.; G-Tube; Currently TPN-dependent.
Meds: Zofran, Pulmicort, Heparin (to flush PICC line), IV Ceftazidime (for Pleural Effusion), Claritin, Colloidal Silver (used topically), probiotics.