Ouch. Sorry to hear that.
Ok, maybe there is a way out. If you still have an early Autosave, what you can do is to compare the edited bard with the unedited one and reset the changes to the original. If you can remember what you have changed, so much the better.
If that fails, I am afraid you may want to kick out this bard and make a new one in the existing game by using character arbitration. That means starting all over again with the xp and stuff, but at least you can move on.
One good tip (which I learned the hard way

) is to keep old saves long enough until I am sure I don't need them anymore.