Sounds like you may be detoxing too quickly. If you are giving up coffee try reducing it by 1/3 per week. So if you normally have 3 cups a day, reduce that to 2 cups, if you only drink 1 cup a day, then only have 2/3 of a cup per day for the first week... 1/3 of cup week week 2......no coffee after that. It may take you a few weeks but it you don't have to be miserable. By week 3 or 4 you will have eliminated your caffeine without head aches and feeling awful. Sugar/white flower/ processed food can all be cut out immediately without pain or too much suffering. You will have cravings but once you get past them they go away, sugar is a tough one but it only takes a few days to stop those cravings. Be sure to eat plenty of fiber by way of vegetables and grains. Fasting on water alone will cause you to detox too quickly and get flu like symptoms, so take it easy.