I received a notification that my account is at risk. My personal information is being used. Maybe a mistake?I have logged on a lot of devices phones, PC's Laptops.

My account is fresh just got it. I used to have it years ago under a different email I no longer have access to. Could it be a mistake? In the last day I've logged on from 2 PC's, 2 Laptops, and my phone. My Wife also did from hers. Could that be the reason because if so these people got me super fast.