WORRIED
I got a message saying "your apple id is now being used for iMessage and FaceTime on a new phone, but i don't have a new phone... Should I be worried?
iPhone 5s, iOS 11.2.1
The e-mail may have been a scam. I would change my password just in case.
Apple ID email address or password - What to do after you change I suggest doing this before you change your Apple ID or password.