What Are The Causes Of Discomfort In Hearing?

Hi, I'm 14 and I'm hearing loud, shouting voices in my head and it makes me feel really weird. I can't make it start or stop and it lasts for about 5 minutes (varies a lot). It makes me do things slowly and it easily distracts me. It happens mostly at home, but a few times at school which isn't helpful. It happens about 2 or 3 times a week and its been like this for just less than a month (started shortly after christmas) I know I'm quite stressed at the moment because of school, friendships and stuff happening at home; could it be linked to that? Also, do you suggest anything to help (voices and stress)? Thanks for your help.
Rachel xxx