Hi, I have been diagnosed with Mitral Valve Prolapse after having tachycardia, chest pain and palpitations. I know it is usually caused/accompanied by an autoimmune or other disease. I have had a resting heart rate of 90-100 my whole life, my feet turn purple but are not cold, my toe nails are very dry and do not look pretty, I have no stamina when it comes to running and tire very easily. My blood pressure is normal and even on the low side though. I get dizzy upon standing, and get very tired and dizzy if in the heat while standing for to long. I have not lost or gained any weight. I get angry and irritable super easily, my anxiety is through the roof, and my sex drive is non existent. Any thoughts on what this could mean? Thank you!