Welcome to HCM
We understand your concerns
I went through your descriptions. You have palpitation
and breathlessness. Cardiologist and other doctor cleared you of any major problem and asked you to visit a neurologist
I sincerely advice you not to be in unnecessary anxiety
about your body conditions. In fact some of the doctors might have told you that it is your anxiety, which is creating this shortness of breath
I suggest you to visit a psychologist
for life style and anxiety therapy after your visit to your neurologist. I am sure that you will come clean from neurologist.
Hope this clears your doubt. Available for further clarifications.