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The subjective sensation of uneasiness you are feeling is a warning signs of some cardiac problem most likely cardiac arrhythmias and it needs to be investigated in consultation with a local cardiologist because it can lead to more complicated situations if left undiagnosed and unmanaged.
Cardiac arrhythmias are the disorder of heart beats and produces fluttering sensation in the chest and uneasiness also.
causes are many- cardiac problems like angina
, valvular lesion, ischemia
, HOCM etc. or the rhythm disorder can occur due to electrolyte imbalances, thyroid disorders- hyperthyroidism
is a known cause of cardiac arrhythmias or a structural abnormality of the cardiac conduction system.
I hope the advise would be informative and useful for you.