Thanks for the comments. I stopped taking the Norco on Friday. I had one in the morning and that was it. I also at the same time finally cleaned my mouth, it had been quite some time since i had brushed or flossed because of the pain but I numbed up with lidocaine and was able to do it.
After all of this I was surprised to find that Saturday and today were the best days for pain i've had! It would appear that I will not need it anymore--fingers crossed.
What is odd is that i don't actually feel anybody, I think I feel worse. Very tired, aches, almost flu like symptoms. Could it be some withdrawl sypmtoms from the Norco? I was only on the stuff for 5-6 weeks and I wasn't taking more than 5/day.

40 yr old male--very active, ns, rarely drink
T4aN0M0 HPV+
11/21/13--Lesion on back right of tongue, biopsy neg, CT neg
11/25/13--2nd biopsy DX SCC BOT
12/21/13--T4aN0M0 via PET and MRI scans
12/30/13--Begin Cetuximab/Rad Treatment
Treatment currently at Stanford Medical Center
2/14/14--Finished 36 rad treatments
2/18/14--Finished 8 cetuximab infusions-completion of treatment
4/26/2014--MRI showed marked tumor regression
5/27/2014--PET clear
8/18/2014--MRI clear
2/22/2015--MRI clear