Answer: Panic attack.
Step-by-step explanation:
A panic attack can be defined as sudden episodes of intense fear that can lead to several physical response reactions when actually there is no real or apparent cause.
It can be very frightening to the people. In this case one feels that he is loosing control over things and even dying because of the fear of things being going around in his mind.
Symptoms can be:
Fear, loss of control, chills, nausea, abdominal cramping, chest pain, chills et cetera.