I tried to run, i tried to hide and i tried to kill him- alas....

All that I remember is the dream starts with me running from my brother. I want my space, I want him to stop pestering me and Im shouting at him to leave me alone but he's always at my heel- it drove me insane, to the point that I started to physically hurt him by trying to smash his head against the concrete but violence didnt work. It was as if I had no strength to do any damage. So I keep running and when I look back this time, he's become obese so I shout "Youre fat and antisocial, nobody likes you, fuck off!". (My brother is not fat, nor am I- we're a skinny family blessed with the metabolism of a hare). Finally he chases me into my bedroom where Im exhausted and holding a knife telling him to just leave me alone, or I'll kill him. My vision then starts to go blurry, the room is spinning and he sticks a straw in my leg and and begins to drink my blood. WTF?