I fear my apple id is hacked
I received several message from apple to my apple id’s recovery email(google)that my apple id was used to sign in to imessage in a 6s plus and then another email said that the id was used to sign in to icloud in a imac 27 then again an email says id was used to sign in to imessage and facetime also from the same mac.;now even though i have changed my apple id pass i feel unsecured can somebody help me fix this problem??