I wished my bully to have miserable life and it came true?

my bully tormented me for years and I wished she would have a miserable life because of how she treated me I said a few years from now you'll get your karma too and it came true. A few years after (after 3 years ) she got lung cancer did I cause that? Or is that just karma?
I wished my bully to have miserable life and it came true?
Post Opinion