Hello!
Welcome and thank you for asking on HCM!
I passed carefully through your question and would explain that it is necessary performing a comprehensive differential diagnosis between different possible causes that may lead to this clinical scenario: a lung disorder, an 
allergic reaction, a metabolic disorder, an infection, etc..  
Coming to this point, I would recommend consulting with your attending physician for a careful physical exam and some tests: 
- a resting ECG
- a chest 
X ray study and pulmonary function tests
- 
complete blood count, PCR, ESR for inflammation
- 
thyroid hormone levels for thyroid dysfunction
- blood electrolytes
- an abdominal ultrasound
- a urine analysis 
- 
allergy tests. 
You should discuss with your doctor on the above issues. 
Hope you will find this answer helpful!
Kind regards, 
Dr. Iliri