In most such cases as this, they did not "successfully send from your actual account", they just spoofed the headers.
Perhaps I don’t know enough here? This would not be the first time a google account was stolen and I’d like to protect what I have, despite having repeatedly tried and having facility members with threads and emails as proof google offered zero help to resolve or even close the account from the their so senders would at least be notified I didn’t get it