I too have had an ACDF at C3-4 and am experiencing the same symptoms. I also am of the opinion that it is going to take some time to fully recover which I am sure we both will.
After surgery I ended up with an ovenighter in ICU. It seems that I was not able to breathe well enough to leave me off a ventilator.
I am 4 weeks post op this comming Monday and have not been bothered with the sore throat for over a week now. The Dr. said I would be singing in no time. This rathered schocked me as I was not able to sing well before the surgery. I wondered if he had given me the blue light special and thrown in something special.
Best wishes,
Ed