I have some sort of phobia and I don't know what it is. Whenever it's dark, specifically pitch black darkness, I feel like I'm suddenly claustrophobic. But this has NEVER happened when it was light, or even slightly light, as long as I could vaguely see my surroundings this never happens but when I can't I feel so claustrophobic, I need to turn on the light immediately. Most people say I'm just afraid of the dark but I don't think so. I told my best friends about it when we were having a sleep over and they told me I wouldn't get scared if there were people in the room. But when they turned off the lights I had to run to turn them on, and catch my breath. I felt like I was having a mild panic attack, but I wasn't. I don't know what phobia this is and I've been searching but I can't find any information. What's this phobia?