It sounds like you made a sincere effort to plan ahead, only to be sabotaged by unexpected problems. Okay, the next time you will probably try to make plans that include safeguards that will prevent your efforts from being thwarted in the same manner.

Perhaps you need to cook up a dozen hard boiled eggs in advance, knowing their number will mysteriously erode in your absence. Maybe you need to keep small "stashes" of hard cheese and/or other acceptable items not requiring refrigeration in your dresser, your workplace, or even in your car.

One way or another, you will develop a system that allows you to reach your objectives without external interference. Keep on trying...it's well-worth the effort!