First time around I had 33 rad treatments and was so stupid I did not ask for one pain med.  My mouth was burned very bad, I would lay awake at night and squirt ice water into it to try to sleep.  Not this time --- a little smarter and a little wiser and not so much a hero.  I am going to ask for alll I can get!!
The chemo isn't as bad as the radiation, at least not for me, however I just started it so I may change my tune.
 Hang in there.  Try the mouth wash and dont be afraid to insist on something for comfort.
God Bless