Hi Hellion.  I too love the name and the great spirit it implies.  While your cancer may be 
HPV positive, I am sure you know how tough smoking is on the oral cavity and the rest of your body.  While you didn't specifically say, I assume you have quit.  
Have you thought about getting a second opinion re surgery?  If I were you I think that is what I would do.  All of the previous posters have given great info - pay special attention to Christine's advice re nutrition.  I fully believe that, in addition to mt OCF family and our FABULOUS medical system, I am still here today because I am a good eater and was able to physically withstand treatments.  
My contributions to you will likely be more about the emotions you will deal with - more about the fear than the mechanics of treatment.  There are so many here with much more expertise.  First of all, yes the fear is ABSOLUTELY normal.  2ndly - Do Not Blame yourself.  3rdly, worry is like a rocking chair - it gives you something to do but doesn't get you anywhere.  Rely on you friends.  Take them up on those innocuous " if there is anything we can do" comments.  Get them to shovel snow, or run a lawn mower, do some grocery shopping, provide a meal for the freezer (tell them of any sensitivities) ow whatever.  People really DO want to help - they just feel helpless.  Now is the time to lean on family and friends. I can guarantee that you will be surprised at who steps up.  Be careful not to judge your friends at this time.  They all handle their fear differently - they love you and some will be frozen in their tracks.  Don't be disappointed.  We are all different.  
Hugs
Donna