These things are real and tend to snowball. Along the lines of “if you go looking for trouble you’ll find it” but not quite. I think this is what people have called a thinning of the veil. Magic thrives in uncertainty, like a fading sense of deja Vu you cannot interrogate. But it is there if you think it is there. Find yourself a dark corner of the world and look at it with the corner of you eye. Convince yourself something is there then decide it isn’t. And the something that might have been will growl in frustration.