Just been reading your posts and I see we probably have a lot in common!
I am a teacher too and I laughed when I read about loo trips, am getting a lot of exercise at work as my classroom is quite a bit away from the staff toilet!
I hate the soups too, so much so that I threw them away because even thinking about them made me gag! I am doing my own version of things at the moment, I suppose its the working solution? I have a shake for breakfast, a bar for lunch and I bring some chicken breast or other very lean protein to work in case I get the weak light- headed feeling. I also bring a can of coke zero. In the evening I have another bar and more meat if I need it. I am not great with getting the water down but I do drink a lot of black tea.
I find I am too weak and light- headed on the total solution plan- mind you I am only a week in- but I feel I cannot risk passing out at work ( I have a long way to fall and nobody would be able to pick me up).
Do you think adding some protein might help you? I think I am staying in ketosis as I seem to have that metal/tin mouth feeling all the time!
Hope you are doing ok this weekend?