Hello and thank you for using HCM.
I carefully read your question and i totally understand your concern. But you should not worry.
These fluttering sensations have to do with some electrical issues in the heart. Some electrical impulses that generate in a part of the heart different from normal sinusal rhythm cause a premature heart contraction that you feel like a fluttering,skipped beat, because its not a normal one.
This electrical issues might be extra-systoles or different arythmias.
The extra-sistolik beats generally are followed by a
pause till the next normal heart contraction. If this are not frequent, in Young and normal heart, it is nothing to worry about, they're normal.
There are different factors that might cause this skipped beats like emotional
stress, excessive coffee consumption , coca-cola or energy drinks, so you have to avoid them.
Pathology like
anemia or
hyperthyroidism might be other causes of high frequency or
arrhythmia.
So, if I was your treating doctor i would say that you have nothing to worry if this happen once a wile, its normal. But if they begin to bother you and interfere in your live we can decide to do some examinations like a blood analyze, your thyroid hormones, an electrocardiogram, echo-cardiography and of course a holter rhythm monitoring to have a full view of your rhythm , to check for arythmia and the extra-sistolik beat frequencies if any.
Only than we can decide what we should do.
Hope I was helpful. Wish you good health.
Best regards.