Hello Lori Ann
Sorry you and your family have to go through this. However, your husbands treatment has every chance of being totally successful. Six years ago I was in the same situation as your husband and am now fortunate enough to regard myself as an oral cancer survivor.
I would suggest that your husband has a thyroid function test before radiation begins. Like many others here I take thyroxine daily now, it is important that it is monitored.
I stopped working, had LOTS of rest and found that laughing with those around me kept me balanced.
Let us know how you both are getting on. People here have travelled similar paths and want to help.
Love and light from Helen