Do some research on line and you will see that some folks after going on the Chantix have committed suicide and I can understand it, because one minute I would feel that way and then the next thing would be me wanting to commit homicide on someone. It is nasty stuff.
I think the getting the nicotine out of the system is only part of it, it is finding other things for the 'oral gratification' that smoking gave us. I found straws, yes drinking straws cut to the length of a cig helped a lot, sometimes I would just keep it clenched along one side of my mouth between the upper and lower teeth, lol
I also bought lots and lots of celery, and made lowfat Ranch Dressing to dip the celery sticks into and then crunch on. Again, oral gratification and no calories, lol
Keep going forward, the bad feelings will pass, but please be sure to tell your doctor exactly how you felt while on it. May make Dr think twice before prescribing it for someone else.
Love and hugs,