@tracey8 Wow, you really have been through the mill!
I have had a similar experience, except I still have all my teeth and somehow avoided most of the pain.
As soon as I could after I got out of hospital and was mobile enough, I got an appointment with my acupuncturist and homeopath. The two together have me back on my feet with saliva more than half way back to normal.
I have just passed the two year mark after radiation and feeling I have more energy. However, I still drink two tetra packs of Ensure to supplement my diet. My mouth is finally healing up so I can eat more normally.
There is a life after all of the above. Keep on keeping on!