lol funny story indeed XD
it could of been a moth, but if it was a faerie, i hope you learned from your mistake, don't cast for fun or to see what happens, you will get in trouble. or to put it another way [which i love] "do not meddle in the affairs of dragons, for you are crunchy and good with ketchup."
as long as you learn from your mistake, don't feel too bad. if you did upset a faerie though, i suggest leaving out some saffron, or honey, as a way to say sorry.