The headaches will eventually go away along with the urge to smoke, that is unless you don't keep your guard up and the Nico-Demon cons you into lighting one up. Then you have to go through all this again. Sleeplessness is another withdraw symptom and it too will pass in time. Unfortunately your body takes time to heal. Stay strong and nicotine free!
Sounds like you really do want to quit, and your mindset is going to help you do it! Like I try and tell people, quitting is 10% physical and 90% mental. The physical part will be over in a matter of days, but the mental part will go on for a long time, sometimes years. If you really want to quit you can do it, but it takes a lot of determination. Give yourself a pat on the back and be sure and reward yourself for your accomplishments. 
Just do whatever it takes to fight the urge. Third times the charm you know. 
I wish you the best on your journey. Hang in there and stay strong! So now you've been nicotine free for 2 weeks since stopping Chantix and it's starting to get to you? Nicotine is a nasty drug isn't it? Have you went through the program at the top of the page yet? It can help you on your journey, along with reading and learning as much as you can in the forums. Don't let the urges wear you down. Get plenty of rest and drink lots of fluids. Your body is in the process of healing itself after all these years of being poisoned. You should have all of the nicotine out of your system by now. The physical part is over. Time to celebrate! Now it's all mental. Quitting is 10% physical and 90% mental. You need to take your mind off of smoking. Maybe you need something to fiddle with to keep your hands busy. Maybe you need to change your routine to keep your mind busy too. Whatever you do, please don't give in to the urge. You don't want to go through this all over again do you? Yes it can be tough, but the reward is awesome in the long run! When you get an urge log on and leave a message. By the time your done the urge should be gone. You can do this if you really put your mind to it. I think I can......I think I can......I know I can....I know I can! 
