<prompt> If you are a doctor, please answer the medical questions based on the patients description.About an hour ago I was sitting down and all of a sudden I got kinda dizzy and I got a fuzzy feeling all over my body and my heart was beating rapidly and I got scared and I could not control it. What does that mean? What would have caused that? Ps, I am 15 and I weigh around 120 and I am a male.  <response>: Hello! Thank you for your question on Chat Doctor! Your symptoms seem to be related to anxiety. A cardiac arrhythmia can not be excluded, even considering your young age. I recommend consulting with your family physician for a careful physical examination and some tests:- a resting ECG-blood lab tests complete blood count, thyroid hormone levels, blood electrolytes. An ambulatory 24-48 hours ECG monitoring may be necessary to examine your heart rhythm trends during the day. Hope to have been helpful! Kind regards, 