Yes. Just from what you've said, I think there's enough evidence to suggest that this was not a mere figment of your sleeping mind.

[She polishes off another goodly bite of her breakfast, then starts ticking things off on her fingers as she chews.]

A message, a place associated with her, and a deviation from the usual in that specific way — someone usually passing by outside who specifically comes in to see you — those would all fit the mark of a prophetic dream.