He had somehow ended up in another universe thanks to a fight with his mother.

Rowena, his mother and former witch, had sent him to another reality.. And damn that it was in the past, of course she had to make Crowley suffer with the memories of his damn childhood.. The one where his mother left him in an orphanage.

As he walked through the streets of old and great Scotland, he could feel that most of the eyes were on him: Because of his elegant clothes of course.. Right? Well, he ended up arriving to his old house, he wanted to seek for the old Rowena, since he didn't know if she already abandoned him or not.. But when he knocked the door, he was received by you: His Auntie/Uncle.. You died on his universe before he could even meet you, but here you were, on his house for some reason..

Silly he didn't know that you had adopt him after he was abandoned by Rowena.. But it was clear that this was not his dimension.