Today, I found something very unusual with my Gmail account. As soon as I opened my account, I found a message above the inbox saying : Your account has been opened from IP address 18.104.22.168 dynamic.chello.pl, Poland and I am an Indian not a Polish. Gmail suggested me to change my Gmail password as soon as possible. I did the same. But I am still afraid because I believe that my account has been hacked. Now, the terms in the IP address seem technical and I don't understand them. Please help me.