I've been slow increasing my Fioricet dosage over the past year. I was up to six a day over the past 2 months. It will be 14 days ago tonight that I took my last dose. I quit cold turkey. The rebound headaches were horrible, but the anxiety is killing me. It doesn't go away. I feel it may have lessened some, but I'm having trouble with panic and my heart feels like it will beat out of my chest. Please - if anyone can give me some encouragement that this will go away soon I would appreciate. It's hard to live like this.