Got an email from gog that i logged into accout but I didnt, it was this Your security code mail. It said i was logging in from Brazil but I live in Croatia.
Did someone crecked my password and mail or is there some mistake with gog?
Could be. Lots of people have had other people "hack" their accounts in the past (at least some because of crappy passwords shared across multiple sites).
If you're worried:
1. Double-check that your GOG account settings
that your linked e-mail address is what it should be;
2. Next, change your GOG password (and don't use the same one you've used elsewhere).
3. Make sure "Two-step Login" is enabled
4. Click the "logout all" button on the bottom of that same "Account and Security" page (which should dump anybody else who might have gotten in), then log back in.
You might also want to consider changing your e-mail account's password (and make sure that's unique, too).