If you can manage it, try carrying some sort of acceptable snack around with you; salted nuts perhaps, or jerky, to pull out when you are hungry, and the only other option is something like bread. One advantage of being female in our society is that we carry purses. It's harder for men trying to fit oddly shaped bags of nuts into their pockets, I understand, but perhaps you can figure out a way. And congratulations on staying strong yesterday!