Is it nomal i have a voice that hates when i give up

I've had this voice in my head for a while now,hes like a personal trainer,always telling me what to do and how to do it.Over the years i've named him jacob and bonded with him, seeing him as how i should be.But lately jacob's got alot louder and more agitated.He hates it when i give up or am weak, no matter how small the situation, he's became what i can only describe as a ruthless and efficient alter ego.When i have an arguement with someone he screams at me to hurt them,to make them pay for agitating me and to make them fear doing this again, it doesn't matter who they are or what we're argueing about,he just wants them to leave me alone.I'm getting worried,he's making me paranoid,he's getting so loud in my head that i have to physically stop myself from attacking every peson who bumps into me or makes a snide remark.I don't want to do this, I want to live life like a normal person without the constant fear that this time he'll be to strong and i will tear out the jugular of the next peson to tap my shoulder or make a sudden move.WHAT SHOULD I DO?