Respected User, hi sorry to hear about your issue.
*This doesn`t seem normal , there is definite underlying pathology causing
  her annoying symptoms of this level.
*Reasons are related to Bronchi / Alveoli insufficient to pump enough 
oxygen,
  Heart valves related or intraabdominal pathology compressing diaphragm.
*She requires intensive work up in form of Pulmonary Function Test , 2D Echo  
Ultrasound abdomen , pelvis & if needed CT / 
MRI lung.
*Treatment only comes after the 100% clinical diagnosis.
*Till then what you can do at all :
@ Make her to do regular deep breathing exercises and 
YOGA at home 30-
   40 min. a day without failure.
@ Take her for regular walk in fresh air to rejuvenate her lungs.
@ Avoid all oily / spicy / nonveg / beverages/ 
cold drinks/ ice cream/biscuit
@ Avoid prolong fasting / overeating.
@ Give her moral support & check out she doesn`t have any 
anxiety     episodes which will aggravate symptoms.
@ Avoid exposure to excess cold.
@ Maintain chart of her Temperature , 
Respiratory rate, weight .
 Hope this clears your query.
 Thanks for using Health care magic & reviewing my answer thoroughly.
 Wishing your Angel fast & speedy recovery from the same.
 Regards.
 Bye dear take care of her.