Brightness Problem

I'm not good in english so im going to post two pictures of the game.
It's about 3-4 months that im having issues with game's brightness, especially in the night and when I'm inside buildings or inside ships. I know that there are no brighness options but I never had this kind of problem (im playing from D1).
As you can see if im outside a tavern I can se clearly inside, every detail, even of the floor, table etc...but if I move a little inside everything become dark, very very dark, I can barly distinguish shapes of tables, chairs and other objects. This issue repeat when I'm inside a ship and I cant see where players are (only tags can help me) and cant see anything.
I dont really know how to go back!
ps: Monitor and GPU settings NEVER changed as Im not good with this things.!!!
PPS: How in hell i put images in my post?!