Do you think the headache and such was a mental thing, getting through what your subconscious or body felt was "binge time"?
Sometimes, you have to take a really roundabout path to get to the same place that you tried to get to with the direct path. It took me doing a Whole30 to really stick with primal and even embrace the 20%. I need a 20% to keep myself from going overboard and sabotaging myself. Everybody's n=1 path doesn't have to look normal .