I am failing school I can't seem to concentrate on my work and then I have people in my class being nasty to me and bullying me ,I can seem to stay concentrated on my work because I start to think about all the things that are happening in my life and then I get upset an it's like I shut down.i sometimes also hear voices when I'm in my lesson and that makes it even harder to not get distracted ,Yesturday when I was there I was in my lesson and started to hear voices and it all got too much for me that I shouted in my class for them to shut up then everyone laughed at me and I walked out of my class and came home ...I am scared that I am going to fail school if I do then I have let my parents down and they will hate me even more that they already do

how can I stay concentrated long enough when I'm in class? Someone help please