HHi dear .
I had gone through your query .
I understand your concern .
Panic attack define as sudden rise in anxiety .
Symptoms like
palpitation /
tachycardia / sweating etc...it may mimic like
heart attack .
But all investigations came normal .
In panic attacks there is no life threatening but it has severe anxiety .
No need to worry .
Just relax and accept your psychological problems .
Proper psychological evaluation and councelling will help.
Supportive
psychotherapy will increase your tolerance to bear that anxiety .
It can be treated with medicine like combination of SSRI and benzodiazapine .
In SSRI
sertraline / escitalopram / peroxetine will help .
Sudden attack can be relieved by etizolam and
clonazepam .
But consult
psychiatrist for better evaluation and assistance .
Still if you have a query then feel free to ask .
Happy to help you further .
Thank you .