Last night I cast a love spell. This morning a blackbird flew to tge window next to me, tapped on it and sat there for a few seconds before flying away. Does this have anything to do with my spell? Is so what?
While there could be no relation of the two which is very possible it could also mean something to you that it doesn't mean to us.
So ask yourself the following questions: what do black birds symbolize to you? What do they symbolize to the one you performed the spell for? What do birds symbolize to you? What does black symbolize to you?
If there is no major standout correlation between those questions it still probably means absolutely nothing. Hope this helps my dear.