"pyschosis" covers almost all extreme mental states.
It's a question of degree. Every "normal" person is a little psychotic and in different way.
When anyone is exposed to extreme and overwhelming stress or fear, different people react differently.
Some might completely numb their feelings and emotions and dry to deal with the stress in a calcualted and unfeeling way (a sociopath).
Others might hear "voices". They can't indentify with or tolerate the unusual thoughts that are produced by the stress.

But what difference does it make? A rose is a rose. If you're experiencing a mental state that causes pain or difficulty with living,
you need effective ways to deal with. It doesn't matter what you call it. It only matters to doctors and insurance companies.