Hi and welcomet o HCM.
This icommonly experieced wehn heart beat irregularly for few seconds or minutes. In most cases this doesnt mean anything serious.It is called extrasystole. Sometimes there can be prolonged heart arythmia
and then it must be terated by certain medicines. ALso you could have experience neck muscle twitching. Whatever it is it really isnt serious if you dont have any other symptoms such as headache, tingling
or vision disorders. I suggest to do ECG or HOLTER to be sure. But you have time for it. Wish you good health.