you need to get yourself checked what you are having is called is intermittent arrhythmia which means that intermittently your heart rate increases or the heart Rhythm changes which can be dangerous if it does not get corrected on its own. but to diagnose it you need to get an ECG, it's it normal then ecg needs to be done while you are having the rhythm problem or you can get holter monitoring for 24 hours during which if you have this episode it will get registered and documented. also you need to get a complete lipid profile done and echocardiography done to rule out heart problems as well..