are you using enough water? Creatine? Ive no experience or knowledge on var but it may not be var related. Youre on high carb diet, and if I was 5-6 days in on a diet thats ~ 180g carbs, I do get headaches like a hangover that will not get away no matter what... thats my take, I hope its not the carbs thats causing you, maybe its just water. Also are you using any caffeine?

Also, what happened to your nickname?