@ss52 I should update my post! I switched cardiologist after the first 5 or 6 would not do a cardiac MRI and thought I was questioning their decision makings. 5 cathetirizations and a femoral dissection, later, I left the last cardiologist, who by the way, ego got in the way, (they were all male) and switched to a female cardiologist who has been wonderful since almost a year ago. She ran a few tests, including a Pet cardiac scan in May, which was "normal". I also saw 2 other pulmonary specialists, that said my lungs were fine. In July, I asked why is it that no one will do a cardiac MRI? She said the Pet scan didn't show anything. I said I want it done! She requested the test and in late August, I was diagnosed with Global Microvascular Disease (small vessels). This can only be treated with medication but is just as serious as the "major arteries with plaque." The new medication protocol I'm on is plavix, losartan, nebivolol, and Praluent Injection 150 every 2 weeks which dropped my cholesterol and LDL significantly from the Praluent 75mg every 2 weeks. Also Nitroglycerin when needed (which is usually upon exertion or stress). So I can't speak enough about advocating for yourself and finding the right fit with a doctor.