Hello and thank you for using HCM.I carefully read your question and I understand your concern. You should not worry . I ll try to explain you something and give you my opinion. This palpitation has to do with a rhythm issue. There are some electrical impulses that generates from parts of the heart different from normal sinus rhythm.They cause a premature heart contaction that its not a normal one followed by a pause and than a normal heart contraction. In these cases you experience palpitation, flattering sensation, anxiety, difficulties in breathing deeply,dizziness. This rhythm issue might be what we call extra sistolic beats or different arythmia. There are different causes that might lead to this electrical issues like simple emotional stres, excessive coffee consumption or pathologys like anemia, hyperthyroidism,electrolyte imbalance, active infections ect. So, if I was your treating doctor I will recommend some examination like an electrocardiogram, a cardiac echo to evaluate heart function and valves, a full blood analyze to exclude anemia, hyperthyroidism and the mos important a holter rhythm monitoring to see your rhythm tendency. Only after this we can better understand what we are dealling whith and how to treat it. Hope I was helpful.Wish you good health. Best regards, Dr.Ervina