A late teen grabbed my arm and said "the devil's coming for you" Should I be concerned?

Yes, I was visiting my parents in North Carolina (I emigrated to the UK) and a guy (around 19-22) said in a spooky stern voice (like he knew me) "The Devil's coming for you, I'd be ready". Ever since then, I can not sleep in my house with the lights off. I feel scared. Do I have anything to worry about?