If you still feel like this then I would do something about it otherwise you are going to get worse and resentful - a small amount of plain tuna or plain chicken (forgo the salad) might help. Or some marigold or 'vegetable drink' - that actually tastes of something, and often stops me picking in the evening. Not sure if you can get out to a shop where you work, if so why not go on a recce and see what you can find?
Don't overload on coffee - I find caffeine makes me hungry!
Horrid isn't it. I haven't had a 'hungry day' for a while, but god when they do come along they knock you sideways don't they! I find best to acknowledge it and do something about it rather than try to ignore it. Hasn't (to my knowledge) affected my losses so far.