Hello, Thank you for your query. Your description of symptoms seems to be more likely to be that of a heart arrhythmia than an anxiety attack. * how old are you? What *do you smoke or consume alcohol? *do you have any other medical issues or take any medications? Like thyroid hormone imbalance, for instance? I recommend : -a physician consult and a cardiologist opinion. -an electrocardiogram and echocardiogram -Holter monitoring if required -blood tests (complete blood count, electrolyte levels, thyroid profile, kidney and liver function tests) -chest xray. Further tests may be needed. Based on this we can arrive at a diagnosis and treat appropriately. It is important to check this out right away. Irregular heartbeat can lead to blood clots that can lead to dangerous complications if it enters the circulation. Hope this helps. Please let me know if there is anything else I can help you with. Wish you good health