Hi, I hope it doesn't sound ridiculous, but i have a fear of dark.
When I was about 10-13 years old I did sneak out from our house after midnight because in the cellar, which was in the back of our garden, so there was a TV what I could watch without my parents permission

That place is scary even daytime but i had no problem to do things like that.
In the past few years it's changed. Now I'm 25 and i can't go to sleep with the lights off. Whenever I tried to switch them off I became so scarred in a moment that I couldn't bear and if I'm trying to wait that's just worse. I'm also scarred about sounds as well sometimes, I barely can watch a movie with my headphones anymore..
What is this? Its just doesn't make sense to me.
Thanks