Welcome to HCM
We understand your concerns
I went through your problem description. I suggest you not to worry too much. From the description you are giving (after having pathological testing and checking EKG), it is evident that you are more a victim of anxiety
and panic attack
. Every symptom you are describing confirm it.
You must visit a psychologist
or psychotherapist soon so that the problem is not ignored. Panic attacks could become dangerous if not treated properly. Therefore please consult a doctor immediately.
Hope this answers your query. Available for further clarifications.