Do you remember something or anyone that saw your Google Authentication recovery key? I've been using it for 6 years and I've not yet experienced nor heard a news that their google auth 2fa was compromised. Nevertheless, this would remind to the members of this forum to take extra caution on their private accounts. Secure them properly and make sure you are the only one that knows it. If possible prevent other people from borrowing your device if you think they are capable of stealing your private accounts.