Hi Sara.e.bedir ,
Welcome to HCM Forum ,
I can understand how anxious you might be and how much concerned you are about this episodes.
Considering what episodic problem you have is typical features of Panic attack
.This is kind of attack
--can occur spontaneously , usually last for few seconds to few minutes
--associated with palpitation
,breathlessness,tingling numbness in limbs,abdominal discomfort,dryness of mouth with heaviness of head with feeling like going to be crazy
--absolutely normal in between two episodes but over concerned feeling that you might have it again and will get troubled in public so associated avoidance behavior can be there
Panic attack can be result of Panic disorder or any underlying physical disorder can be confirmed after thorough investigation ( like thyroid profile, SOS EEG etc ) This disorder is very common , can be easily manageable and completely treatable.So visit to nearest psychiatrist
who after thorough in person evaluation will confirm the diagnosis and start treatment accordingly.
Hope this helps to you.