Is there any chance you created a second account? There doesn't seem to be any record here of any deleted posts by your account.
If you keep old e-mail, try searching for any e-mail with "Reply to thread" in the subject. If you have any, have a look at the first line which says "Hello ...," as what follows the 'Hello' is your username. If this is anything other than dkazaz, try logging in with that or do a "Lost Password?" if you can't remember the password.
Another option would be to send me a Private Message with the e-mail addresses you had around that time (if you don't mind doing this). I can do a look-up to check if there was any other user username registered with each e-mail address.
Edit: I didn't see your reply until I posted this.