'I think I will die! '

That's what someone who has panic attacks thinks. 

But what is this? 
A panic attack is an abrupt outbreak of fear or intense discomfort that reaches its peak within a few minutes and, during which, the person experiences physical and cognitive symptoms, such as: tachycardia, shortness of breath, dizziness, fear of dying or to drive you crazy. 

But remember: there is treatment and psychotherapy can help.