How does cutting out carbs effect your energy in the immediate sense? I have a professional exam I am taking in 29 days (it requires over 300 hours of study to have a chance to pass) and I don't need any lack of energy!
add plenty of protein, especially after you work out. if not, you'll find yourself crashing after expending energy. I actually found that upping the protein and cutting the carbs increased my energy immediately. But, people are scared to eat more meat and eggs because they think it'll make them.
Eat enough protein and fat, and cutting carbs will go great.