Support for caregivers: I feel helpless not being able to fix things

It’s only my husband and I with a dog. My husband just went thru his first chemo infusion and he had a terrible week. I feel I’m doing everything wrong.

I feel helpless not able to fix this problem. Seeing loosing so much weight and with little energy, it breaks my heart.

Does anyone have recommendations on type of foods that can provide him with energy?