Thanks for posting your query.
Although you have normal EKG ans stress test
, yet you should go for 2 D echo & coronary angiography
You have positive family history of heart disease
and diabetic and high cholesterol
also; these investigations are mandatory for better clarification.
You should consult with internal medicine specialist and should go for thorough check up.
There may also be possibilities of asthma and can be judged only after clinical examination.
You should also use inhalational therapy using anticholinergics and beta 2 agonist.
Dr. Mayank Bhargava