The Cupboard Is Bare

It started yesterday; I needed to buy a bottle of water for a guest speaker who had come in to speak to the students.
No water in the University cafe (run by Starbucks- boo! Only used when desperate).
After racing up and down a few stairs, I found vending machine that sold water, which was a bit of luck.
Later, I went to Camden. I went into a cafe because I was starving. 'Sorry, no food', said the persona behind the counter.
So I went to the next cafe. Both of the things I asked for (first one, had run out, second one had... run out) weren't available.
Today, I struggled through ghastly Westfield Stratford to the best Lebanese restaurant, driven by my appetite after  avery busy morning. I was looking forward to a chicken wrap with spiced potatoes.
'No chicken', they shrugged.
No food then.
Everyone's cupboards are bare this week, which is completely unnerving. I always mean to make sandwiches before I set off, but you guessed it, every morning the cupboard is bare. I either have bread and no sandwich filling, or sandwich filling and no bread.
I can't think of a solution for this state of affairs at the moment.