Like most of the said, in the 3 weeks is when it hit me the hardest. It was rough for me, I stop eating all together.
The best thing to help me was the the pain meds, it helped when I need it. Take it to get through the rough times, I found this stuff called Emu Oil and used it on my neck after treatments. It help a lot were my neck healed up great. No one could tell I had radiation treatment. the doctor nurse did not like me using it because the doctor did order it. I found it to be better then silver cream they were giving me.
Keep your head up and keep going.