I was just diagnosed with pulmonary embolism. I had a CT of chest with contrast and the radiology reports states mild cardiomegaly aortic calcifications without aneurysm and nondilated main pulmonary artery. I am on blood thinner for this with a repeat CT in 6 months. My question is that I have had shortness of breath and get an acid reflux pain when I walk and have to stop. I can count to 6 and the pain goes away. Why do I get this pain in my chest and shortness of breath. Does my diagnosis in the CT scan tell you why?