I think i have ghost issues!?

Well, to be honest, weird things happen in my house. I live in our 4 room basement, with my younger brother. My older sister, who is 22, had weird, creepy dreams when she slept in the basement, before she moved out. THe dreams ALWAYS consisted of a little boy with no eyes who got run over by a train and our house was built over his body! (CREEPY!) And weird things happen all the time, such as; Knocking noises, lights flickering, scratching, things being moved, doors left shut being opened, and sometimes, late, late into the night if Your still awake, freaking bloody murder screams, like someone is murdering people in my house! I always check, and no on es there. Its not harmful, because no body's been "Attacked" or scratched, or bitten, but these have been hap pending for years now but get worse with time. Ghost, or am i crazy? My brother gets scared alot too, so im not the only one. please help? And what can i do to prevent the ghost being here? My parents don't believe in ghosts and wont call a paranormal team. Thanks!