Some great advice here!
One of the things I remember from WW years ago is to leave that slip up in the past and get back on your program on your next meal.
I made DH some split pea soup with chicken boullion (I use goya packets, they're good and so easy to dissolve) you could use chicken stock instead, chopped up a carrot and onion, then hit it with the hand blender once it cooked up, so basically just left out the ham, it was delish.
I'd recommend some soup, even chicken boullion or tea with honey, the BRAT Guac suggests sounds good, too, I think you need to make sure to get some nutrients into your body and liquids, that'll help to not be so hungry when you start feeling better, the liquids help because if you don't get enough liquid your body will actually start holding on to it, so you might initially have a loss from dehydrating a little bit, but then will start retaining water and see a gain.
You're doing great, as Syndehat says, feel better and chin up, everybody slips up, "to err is human" it's a learning experience, you'll know better how to deal with something like this in the future.