While he was studying, Matthew was suddenly overwhelmed by feelings of intense apprehension. For several minutes he felt so agitated that he could not catch his breath. Matthew was most likely suffering from a(n):
panic attack

Explanation:

An attack of intense fear caused by severe physical reaction without having any apparent danger or cause is called Panic attack.

A person having panic attack might feels if he is dying, having a hear attack or losing control. Most of us suffer one or two panic attacks in their lifetimes

Severe stress, divorce and death of a loved one can cause panic attacks.  Other physical causes and panic attacks can also cause panic attacks. Although panic attacks are not dangerous but they are intensely uncomfortable. It is not easy to manage with treatment.  

the 5th amendment is about the justice system

explanation:

there is no double jeopardy

due process

grand jury

and that you can’t incriminate yourself

no one should discriminated against because he or she is not from a minority group