I second both thoughts, keep food around that you can just throw in your purse...ie canned protein shakes, protein bars etc. BUT plan everything the day before! Saturday night, get an Igloo lunch box and put everything you will need in it for the day (you never know what might come up) and an ice pack in the freezer then when you get up late you can grab the ice pack, through it in the igloo and be off!
I have a bag I keep all my things in, my purse and keys too so I won't forget it...I pack it before I head out to work. It has saved me more then once.
AND...don't worry, it will all come together...promise.
Angela