Am glad you had your dental work before beginning radiation, that is usually important as having radiation can interfere with healing subsequently. See all the docs you can--the more brains considering the problem the better, but just make sure they are talking to each other and coordinating your care, not competing to determine your care.

My readings and my docs all indicate that chemo can make the tumors more susceptible to radiation in some forms of oral cancer, and it may be recommended for that reason as well.

The truth is that treatment will likely be tough, but it affects everybody differently and after a difficult few months it does begin to get better for most of us. I second the advice about avoiding your favorite foods during treatment (and for a few weeks after tx ends, as the radiation continues to affect you for weeks after the last tx); you definitely do not want your favorite foods to be associated with the tough times of treatment or with side effects such as distorted taste, nausea, etc.

Do read about your cancer and its treatment, and ask all the questions that occur to you: what are the options, what are the advantages and disadvantages of each, what will happen if I choose A over B, what should I expect and for how long, what changes might be permanent and can the risks be reduced, etc, etc. Sometimes treatment preferences are based on individual doc's experiences and preferences and not necessarily on the latest research, so make your doctor defend his choice above and beyond "in my experience"... or "that is the standard treatment protocol".

Good luck, and do use this site--I have found it to be very helpful both for information and support.