The Impossible Door in My apartment

"I was in my apartment, or something close to it, and found a door in the hallway I swear isn't real, tucked between the bathroom and closet where there's no room for a door at all. opened it anyway, didn't think twice. I was led into this huge room, way bigger than the actual apartment could hold, furniture I've never owned scattered around, light coming from somewhere I couldn't trace. walked around it a while, touching things, none of it familiar but none of it alarming either. I tried to find my way back out and the door had moved, now behind a bookshelf that wasn't there before. wandered a bit, found a different door, led back into my actual hallway like nothing happened. I kept trying to explain to myself how the room fit, math not working, apartment definitely not that big. gave up trying to make sense of it eventually. woke up still turning it over, that same puzzled feeling stuck for a bit after opening my eyes."