My hubby and I quit together, we also had some insomnia, and the other lovely symptoms you mentioned, but for the insomnia - we started taking the pill earlier, still with food, at least by 5pm, and then we had no problems sleeping.
It is well worth it IMO.
If you stopped the chantix, then it is probably your body adjusting to life without nicotine, you might have to ride it out, perhaps herbal tea, exercise, and water will help detox you, again, well worth it.
Sue
[B]My Milage:[/B]
[B]My Quit Date: [/B]5/3/2007
[B]Smoke-Free Days:[/B] 166
[B]Cigarettes Not Smoked:[/B] 1,660
[B]Amount Saved:[/B] $290.50
[B]Life Gained:[/B]
[B]Days:[/B] 15 [B]Hrs:[/B] 20 [B]Mins:[/B] 9 [B]Seconds:[/B] 23