Gloria, sorry to hear this but we're here to help. Sounds to me as though you're taking all the right steps. Additionally, now is the time for your husband to eat everything in sight and anything he likes. Most of us lose weight during rads so he might as well bulk up now. The fact that he's
HPV+ is, as I'm sure your docs have told you, a hopeful turn of events!
Might not be a bad idea to get his thyroid checked too, as radiation can mess with the thyroid (it did for me).
We all understand the overwhelming part! But he's fortunate to have you to help him. He's going to need all the support you can provide. And you'll need help too! So don't neglect yourself in the process.
Ask any and all questions you can think of. The people on this forum are fantastic. Someone will undoubtedly have an answer, and all us are here for you.
Courage!