John, it's important you keep your weight stable in preparation for whatever treatment you may need, OC or otherwise. Make yourself smoothies with milk (or ice cream) with bananas and peanut butter. It is delicious and is loaded with calories.

I am a worrier too. But during my husband's treatment, I realized that if I did not at least make an effort to let things take their course, I would end up having a nervous breakdown or losing my physical strength and I would be no good as a caregiver. I focused on getting prepared -- like making up timetables for his feeds, writing down the amount of water and calories he was taking in, etc, really practical things to help myself feel that I was being effective. That helped tremendously.