You may also want to consider that your diet seems to have no significant amount of fat. Personally, if I were to go carb-heavy, I would need to eat every half an hour or so just to keep my energy level constant. The minute I stopped eating would be the minute I fall asleep.
I keep my carbs to a minimum (I also train heavy 5 days/week so it's impossible for me to go low-carb at the moment) necessary to sustain my level of activity, but most of my daily energy comes from fat, either in the form of whole dairy, eggs, nuts, or fatty meat.
Are you getting any physical activity? IMHO cardio wears me down quite a bit, but weight lifting will often give me a significant energy boost.
1) eat real food - more vegetables, moderate meat, moderate fruits, less grains, less sugar, less vegetable oils.
2) exercise - moderate intensity cardio, sprinting, heavy lifting, dedicated stretching and mobility.
3) live - relax, de-stress, meditate.
Disclaimer: I'm not professionally qualified to make any formal recommendations. I've just done my homework and I'm my own guinea pig. All of my data, unless otherwise cited, comes from a sample size of n=1 (me).