The symptoms seem to indicate that you have a hemolytic heart disease, which means you have to do some tests, but you have to narrow your arteries so you don't have enough blood and oxygen to your heart, which can lead to heart palpitations, increased heart rate, swelling of your arm and so forth.
Doctor, your neck is so hard and your chest's beating these days, and I can feel your heart beating, your legs and your arms swelling, what's going on?