Dr. Hibberd's answer:
 

I suspect you do have serious problems. The most serious is that you have ignored early warning signs of a change in your health that has seriously affected your present ability to function, yet you have chosen to delay seeking care. Call your doctor now or go to the ER.
 

Shortness of breath and episodic chest pressure are red flags for impaired circulation to your heart, lungs, or both. Chest pressure often occurs when the blood supply to the heart muscle is inadequate. The danger here is not just that the heart muscle may be oxygen starved and not able to pump well, but also that the electrical conducting system of the heart will malfunction, as it depends upon normal blood flow to the heart muscle.
 

Any interruption of the blood supply to the heart may cause the conducting system to malfunction, potentially leading to unpredictable sudden cardiac arrest and death. While there are many other causes of shortness of breath and chest pressure that can put your life in danger. These symptoms are present before heart attacks and are sometimes our only warning of impending heart failure, collapse, or sudden death.
 

You need to be seen by your doctor without delay or go to the nearest emergency department for evaluation now. Asthma, lung disease, pneumonia, blood clots in the lung, and aneurisms can cause similar symptoms, yet you have the classic heart complaints that we warn everyone never to ignore.