Is it normal to fear a clown when i know he's there but idk where?

When I was little, I was alone in the bathroom and school and there was a power outage so the generator lights were on. Well a voice came into my head calling my name and saying vulgar things. I became aware that someone was in the bathroom and I knew it was him...a clown...But I did not know where he was. Since then, he has been there and I never know where he is. I know he is there though. There was one night I laid in bed and I knew he was next to my bed but I froze. My breath stopped and my heart pounded throughout my entire body. I couldn't look up to him but I knew he was there...is this normal?