I’m assuming you didn’t give anyone your eve account info. If that’s the case, then your email could be compromised. Did you give your email address to anyone in the game?
Are you checking the right character on that acct? Did you log into an acct with almost the same name that wasn’t the one you intended to? Is this whole thing a bad dream?
Did you check your contract logs and trade logs? If someone accessed your account and traded stuff away then there would be a log of the transactions somewhere.
You can check your Wallet’s Journal and Transaction history. You can also check your Completed Contracts history.
You should also be able to log into your Account Management page and see the past account logins under “Account Activity” to see when they occurred and from what IP address.
When CCP added contract history to the API I think they deleted or at least obscured old contract history. So it may not be possible. Also trade logs only go back 90 days I think
Some contracts only disappear after one year or such at least based on my experience, public contracts (auctions and item exchanges) in my case but not sure if it applies to private contracts too. So if this happened a long time ago probably the logs won’t show it. Not sure about transaction logs but maybe those have some sort of time limit too, dunno.