Im 15 years old, and i ALWAYS hallucinate...im super freaked out about it too..can someone help?!?!?!?

ok so, im 15 and ummmm i get emotional and mental abuse from my older sister who is 16. My dad is like never home, cheated on my mom, still does........and my mom well shes super manipulative. I thought this might help so im telling you about my life. So im super depressed and no i dont drink, do drugs, smoke weed, er anything, or cut myself. So im always hallucinating like im REALLY afraid to shut my eyes when im in the shower cause i feel like a demon is going to sense my fear and i dont know....and at night i always see shadows, and like my window to my bedroom doesnt have a curtain and theres a tree outside, so at night i always like makeout a face in the trees....it really creeps me out. And when i go down to the basement to do laundry i run back up cause i feel like a demon is behind me. So i shut my eyes a few mins ago and opened them and really quickly turned my head and i felt like i saw something escape really fast. anyways i feel like im crazy or something........so what do you think? and my parents are scientologists so they dont belive in meds so dont suggest that.