ok well i'm 15 and I'm not aware of depression being in my family (although my family is very small and alot of them are overseas)

I think about suicide alot..
My dad hits both me and my mum (but no my bro cause he does taekwondo) and my bro will try and get him to stop, but dad holds us at knife point so he can't
he's left bad bruises on me and my mum and strangles us
mum won't do anything, she ignores it, and says its cause he is stressed at work
i snap at people, even animals really easily
i get irritated easily
I have alot of hate towards cirtain people and things, and often think about killing people
I get distracted really easily
I go along with whatever people say, which has led me to do stupid things
I've been caught shoplifting
my grades are slipping , I use to get b's c's and rarely d's now i get all d's e's and if im lucky 1 c
I started cutting myself about 1 1/2 years or so ago, but i have stopped for a few months, and dont wanna stat agin
I constantly have headaches that cant last weeks
I can't sleep it takes me hours and i find myself at 4am sstill laying their...



sorry for going on, i just really need advice..
i dont wanna call cops, mum wont take me to the doc, cause i dont want her or anyone i know to no how i feel

im worried im going to do something bad..help mee
they havnt all apeared at once :\
they have built up in the past few years..
I did do taekwondo for awhile, but i got kicked out...