Oh Bella, I am so sorry you are feeling so badly.
You really and truly should go home and take care of yourself. Work can get by without you, they always manage somehow.
Clear fluids as soz suggested, Pedialyte is a great source of electrolytes that are flushed out of your system. Once you can keep that down, move on to clear broth, like chicken broth and see how that holds. Next is to introduce a bit of cooked rice or noodles to go with the chicken broth for some solids.
It sounds like food poisoning might be a stretch, but one can never tell for certain.
Just be extra kind to yourself and nurture your body and soul....
Will be sending good healing thoughts your way!