don't panic yet
.
I got a few suggestions:
you could fire up your sql file, and replace the old url with the new. OR
on your new current server and domain:
take a full backup snapshot with this plugin:
WordPress › Duplicator « WordPress Plugins
Now you should delete you mysql database and all ftp files, and then restore the snapshot using the install.php and insert your new url in the migration process
.
that would hopefully solve the problem, if you got any question, just ask ^^