Retaking offers only opportunity. You have nothing to lose. Even if you get dinged in the meantime you can sometimes appeal the decision once you have a higher score, though if you were borderline they might have held you anyways.
Don't bother binding. Turning the page takes the same amount of time bound or unbound and if you have made it this far in life you shouldn't have an issue with this on test day just because you didn't bind your PTs.