Yes, within psychiatry the belief is that SEVERE stress can cause psychotic symptoms (auditory/visual hallucinations, paranoid delusions etc) to those who are vulnerable
. This website explains in perfect details and clarity in a much more calming way than i can so i suggest you take a little look ^^ http://www.aminormal.org/stress.htm
On a side note, I have experienced hearing voices before, and upon my first time around with it I met a psycholgist who gave me on the spot CBT, his first words were the most calming ive ever heard, he simply explained that it isnt a extra voice from nowhere, and you arent insane, its just that when you stressed your mind can trick you into thinking its an external source, the voice may often tell you negative things or mock you, or speak in an agressive unknown vocal tone of the opposite sex, all you have to remember is that its your mind!" and just let it happen
and if it is stress caused, then it should fade away as quickly as it came :) promise!