Hi,
From all the information available above we can conclude that you may be having uncontrolled hypertension. The symptoms of heaviness in the chest should be taken seriously and coronary artery disease should be ruled out with appropriate testing. Do you know your cholesterol levels? Have you done a renal function test? Have you undergone cardiac stress testing ( TMT or ECHO)?
These would throw more light on the cause of your breathlessness. Do you have swelling in your legs ( ankle edema)? This is a very important symptom to look out for and immediately inform your treating physician, considering your family history. Considering your symptoms and current BP readings you may require a change in medication and further testing. I feel that you should take the advise of a physician nearby for these and come back with reports so that we can form an opinion and help you.