Lung hypertension can cause high blood pressure in blood vessels carrying blood from the heart to the lungs, which can cause fatigue, blood loss, shortness of breath, and heart failure, which I recommend further testing so that you can check your diagnosis and start a proper treatment as soon as possible.
Doctor, I've been very tired lately, and I've been vomiting blood sometimes, and it's hard to breathe, and my heart beats very fast, and what's the cause of these symptoms?