I was diagnosed December 2012 and had most of my upper palate removed and now I have a hole directly into the sinus.  I was clear nodes and did have radiation.  I came through it all very well.  I felt the same when I found out. I did get some Xanax to get me through until my surgery.  I have not taken it for over a year, however, I was grateful when I had it when I needed it most.  Some big decisions need to be made.  I still cry sometimes when I allow myself to worry but I focus on living the best I can.  Get through the treatment - that is step one.  Start there and come back here for step 2 - Living with it.