I am now at day 4 of my quit and yesterday afternoon I started the worst headache I have ever had. I STILL have it. Advil doesn't seem to do anything for it. It feels like my brain is to big for my skull. Throbbing pain. Like labor contractions in my cranium. Does anyone have any ideas for relief? I am taking Zyban. I'm trying not to do any nicotine replacement but starting to reconsider. Can't sleep, don't want to eat, just hurts. I was prepared for the mental anguish of withdrawals. Edgy, shaky, grumpy. I never thought there would be physical pain!