I have Juvenile diabetes of 53 years. I am on many medications and on the insulin pump. I have been treated for COPD even though they do not think I have COPD My breathing problems started 4 yrs. ago. A heart cath and checking out my lungs revealed they were in great shape. I just had an exercise right heart cath to rule out pulmonary hypertension and any heart problems. Everything came back normal I am having difficulty breathing. It feels like I cannot get full breaths. This makes me tired. No one can figure out what is going on. Do you have any answers. I am on many medications. Could I have developed an allergy to a medication?