Hi, I m a 25 year old male and over the last week have been experiencing progressively worst shortness of breath and chest pain. My symptoms now are; Shortness of breath (when I breath deeply there feels a squeeze on the side of both lungs) Chest pain on the LEFT side of the chest around the nipple Dull pins and needles type pains in the left calf, left forearm and left side of the neck. Heart Palpitations All my resluts for the following have comback normal; Chest X-Ray Blood Tests ECG Doctors reckon I have an infection in the lining of lungs even though my blood tests show no infection. The only family history is diabetes and deep vein thrombosis. Please reasure me that this is the case?