There’s tons of different kinds of bread, cheese, deli meat, spreads, nuts, fruit and vegetables that you can easily make a different combination every day for a while. And you could pack a lunchbox that is enough to feed you for the day and leave leftovers at home.
Something the OOP also forgets to take into account is that a LOT of pregnancies fail. Especially in the early stages, before the pregnant person even knows that they’re having a miscarriage.