I'm kind of puzzled that you are still going thru this after so many years. That being said, I have totally been in your position. I was starving, my friends had nothing to offer but pizza, and I didn't have money to go to a store nor did I have a ride home. I had packed food but had finished it hours ago. Now, I learned to pack extra food than I need, any time I step outside the house. Even if I'm only driving a short distance away, I think "well, my car could break down and the tow truck guy could take forever!" Plan for the worst, hope for the best. Some of my friends felt bad the last time I had nothing to eat. They said they will take me to the grocery store so I can buy stuff to leave in their cupboard. I noticed you said you don't eat a lot, bad Idea, just eat right before you leave for the day.