Caffeine is one of the toxins you are trying to remove from your body, so how could it be "OK" to have a cup or two? Try a cold compress for the headache. For me, a hot bath with a few drops of Rosemary essential oil helped with the worst of the headache pain. I am on day 7, and had a headache for 3 days, but I feel more clear-headed than when I was drinking coffee. Hang in there!