Chere - the more advanced the stage is does not always mean a poorer outcome. If you search from the home page of this site for "staging" you will get to:

http://www.oralcancerfoundation.org/facts/stages_cancer.htm

This has some really good information on the stages. Lots of people here with advanced stages have had very successful outcome. So the stages don't always dictate the outcome. It's good your husband is having a CT scan. You can also get lots of info on CT scans. Are you anywhere near Tucson? There is a Comprehensive Cancer Center there if you want to find out more about what they are. Just go here:
http://www.oralcancerfoundation.org/resources/cancer_centers.htm
You could also ask if the doctor you are seeing is part of a Cancer group where they all get together for a team approach to suggesting types of treatment.
I know the waiting is so-o-o hard, but try not to worry too much until you know something for sure. When I first found out about my son's cancer, I found that taking deep breaths, exercise and keeping busy helped - and especially coming here for answers. Let us know what happens.