<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have heart conditions that run in my family, and my father has A. Fib. My symptoms have been pain in anklesfeet while resting, cold extremeties, discolouration, severe chest pains, tightness in chest, pain in chest, heart burn, tinglingnumbness in left arm, palpitations. I am 22, 511 and 140-145 lbs.  <response>: Hello! Thank you for asking on Chat Doctor! I read your question carefully and understand your concern. Your symptoms seem to be related to anxiety. Your family history for atrial fibrillation doesnt seem to be related to your symptomatology. Has anybody besides you noticed the skin discoloration of your limbs? You are too young for such cardiac disorders. Anyway, a metabolic disorder like thyroid dysfunction, etc. can not be excluded. I recommend consulting with your GP for a careful physical examination and a complete check-up : - a resting ECG- a chest X-ray study - blood lab tests : complete blood count, thyroid hormone levels, blood electrolytes, fasting glucose, kidney and liver function tests, cortisol plasma levels, etc. A treadmill test and an ambulatory 24-48 hours ECG monitoring may be necessary if suspicions of a cardiac arrhythmia are raised. If all the above tests result normal, the main cause of your symptoms would be just pure anxiety. In such case, I would recommend consulting with a specialist of this field to help you manage your anxiety. Hope to have been helpful! Best regards! 