The first 2 weeks you really don't feel anything. The last 2 weeks are hard. I felt worse the 2 weeks after the radiation stopped. I drove my self through the entire treatment and worked through the entire treatement only taking shorter days at work the last 4 weeks. The hardest issue is eating after 2 weeks. Go for soft non acidic foods and if that fails do 2000+ calaries of boost or ensure the liquid suppliments. Good luck and hang in there, it was the fastest 6 weeks of my life so that was good.