This might be a stupid question, but you don't know til you ask, and better to be safe than sorry.

I'm just a little paranoid about these things!!!!

I've been off work for 2 and a half months with morning sickness and I'm starting back on thursday.
I want to be organised so I don't have to do too much in the morning before I leave so...

Does anyone know if it would be ok to make my sandwich for lunch the night before and have it in the fridge ready to go?? I would usually have cheese, tomato and cucumber, but wouldn't want to endanger bub if it's safer to make it in the morning?