Milka,
I had the very same surgery you are facing. Mine was done at the Mayo Hospital. The surgery was very long (14 hours). Part of my fibula was used to rebuild the mandible. I was in the hospital for two and a half weeks. I had a trach and didn't talk for about a week, but there is nothing wrong with your brain and you can certainly write notes and tell people of your concerns. The very next day I was walking with the help of a physical theropist. I was told to put pressure on my leg where a portion of the bone was removed, but to pretend that I was walking on a cracker and to be careful not to break the cracker. After three days I could walk normally. Get out of bed and wolk as soon as possible. Even around the hospital corridor by your room. Moving helps you gain stregth, but aids in your recovery. A very positive attitude is imperative. Tell yourself I can do this and everyday I will get better. It works. I was driving with in a month of the surgery. I wish you a successful surgery and a very speedy recovery.

Hacklene