I consider myself to be an anxious individual. I have had episodes of sudden, spontaneous elevation in heart rate even whilst not doing anything strenuous like exercise. I guess you could say its like having a palpitation cos I can sometimes feel the elevation and thumping of my heart when it happens. They feel regular in rate. I normally do deep breathing exercises and they go away though the fright from the experience doesnt. I have had ecgs and seen my general practitioner. My bloods, including thyroid, cholesterol, haemaglobin, white cell count, calcium, potassium, sodium are all normal. Blood glucose ok. Im having a cardiac 24 hrs at the end of the month. My dr says he thinks its stress/anxiety. Sometimes i get symptoms 3 times a week. I have a stressful job but my home life is good. Since my blood tests and ecgs are normal, as a 32 year old who doesnt smoke, drinks sometimes, and exercises regularly should I be worried.