From your age, presenting complaint and history, it appears, a tachycardia-bradycardia
syndrome, a Stokes- Adams attack, a mitral stenosis(MS), congenital heart etc., may have to be eliminated before calling it a cardiac neurosis
, panic attacks, etc.,.
You may please consult your cardiologist immediately for a detailed examination, all necessary investigations, and suitable advice.
As the presenting complaints are related to your heart please don't neglect.