Michele, you've heard from the best, and they're all right. You MUST be as strong or stronger than you've ever been for him now. The last week of radiation is a bleak time, we all know that, but it's absolutely essential to his recovery. In a few months you'll both look back at this with gratitude. I know you have what it takes to help him through this very difficult period. And we're all here for you too.
Courage!
Oh and hydration is a must. I went in three times during rads just for a bag of saline, and it was a lifesaver and gave me an amazing physical lift each time that lasted for a good 3 days.