Glad to hear you're doing well! When I ran into headaches or lightheadedness, I just had another lemonade. You'll be suprised at how the weight falls off (though this should be a bonus to the cleanse - not the reason). I never thought in a million years I could do 15 days, but after the 4th day it was easy! If you can get through the first 3 days there's no looking back!