I had my an removed in June 2013. I was off work for about 2 months, and went back part time in Sept. It took only a month to realize that I could no longer be efficient at my position in the Army, so I decided to retire. 2 1/2 years later I still have the "wonky head", cant drive at night, and get tired in the afternoon. I find myself having to really focus on walking without stumbling, and keeping my balance when I stand up. I am able to run with the wonky head, but it has taken some practice. I will say that there are days that my balance is better than others. I figure that it has been over 2 years so any progress is a benefit.
My advice is to take as long as you can to heal. This type of surgery needs time, and your body needs time to adjust. I wish I would have taken more time prior to going back to work, even though it was part time. Good luck to you.