I've never done it, but I have read that there is a way to recover your account if you still have the password or keys and it's been less than 30 days since the password changed. Not sure if this is the most recent process, but you can try starting at the link at the bottom of this page - https://steemit.com/steemit/@steemit3/third-update-to-july-14th-security-announcement-account-recovery-begins.

Welcome back. And good luck.