Too bad the experiment didn't work for you, but I agree with Jac that recognizing early that it's not for you is a good thing. If it's interfering with normal function, it's not working.
I have to wonder though, how long do you normally go without eating? As in, what is the normal spacing of your meals? I'm finding it not so bad on the tatos, but I normally tend to eat 2 meals daily, lunch and then dinner 5-8 hours later. Sometimes evening snacks if the meals were too small, but I can also fast all day with no trouble when I feel so inclined.
Anyway, good effort, but coping comes first, for sure.