Village being used by another device issue

I have tried to research this first, but I didn't find anything helpful.

Randomly, about 2 hours ago, I lost connection while in game, and it said village being used by another device. I haven't given any information to anyone, friends, family, nothing. I have two devices, my phone and ipad, but I made sure the app was forced close on my phone, and I am still getting this disconnection. I changed apple password and gamecenter password (same thing i think), and i logged out of gamecenter, thinking that somebody somehow ♥♥♥♥ed and logged into my account. Afraid that someone will log in, change my password, and completely steal my account. Is this possible? Is this an error? Something I need to be worried about? if ♥♥♥♥ed, can they be traced in any way?

Any information or input would be greatly appreciated.