But how it's possible that someone logged one minute after me. I played here today first time since a longer period of time and haven't told anyone about it. What's the probability that someone logged in the same time like me instead 30 minutes before, 2 days before etc..
If your account has been compromised, then everything is possible as it could be someone very close doing this. Now that you've discovered the problem is from your end is better to analyze every possible scenario and check your email and other platforms with which you use the same username/email and or password to prevent further losses.