Hi Atiba, I am so sorry about
your mother, I am sure it is very difficult for you. I agree with what Shynsassy has said about
seeking help with your school counselor, perhaps they can help set up some outside resources for you. Does your little brother still live with you? How old is he and does he depend upon you financially? I understand it is difficult when so many things pile up on you at once and depression gets so severe...but just think how if you hurt yourself that would effect your brother...he has already lost your mother to violence, he needs you to be strong and to be here.
I am going to post a few links below for you just in case you feel you may need them...but know that we are always here and you are always welcome to post.