Please help...what should i do??

my dad is really abusive likes to hit me around has also done some other things i'd prefer not to say and my mom has m.s. and drinks and smokes a lot with her meds...shes also hit me around and recently i started to fight back against it i called cps (who didnt even investigate the claims) ive tried and tried to get out any way possible & nothing works its been really pushing me to my limits and on thursday i had a choir concert and i just broke down i didnt leave my room until tuesday afternoon i also didnt go to school friday monday tuesday wensday and i got really weird when i was cutting i couldnt control myself and then i got this horrible nightmare that became a hallucination (i think?) and my shrink doesnt believe me like he ever has and everyone has stopped listening to me so today i just snapped i got in a fight with mom and wrote on her door some awful things in my blood and started breaking christmas ornaments and and yelling and i borrowed without permission the car and