You're still only a couple of months post op so you probably still have a good deal of swelling. The swelling makes your vocal cords more massive and make it more difficult for them to vibrate at a higher frequency. It can take nearly a year before you see the final results.
As you went to Dr Haben, if the tracheal shave was an issue, CTA would have been offered along with the standard cord shorting. I am not sure if you received CTA but if you didn't, it's probably just a matter of waiting for the final results.
