Sorry you're having trouble, Billsgramp
The nausea was truly awful for me, too. Are you on the "full" dose (like week 2 or beyond)? Are you taking it with a full meal, or just a little bite of something? Also, make sure you take it with a full glass of water or milk.
I did all of those things, and I still had the nausea something fierce. I ended up splitting my pills in half and taking a half-milligram four times a day instead of one milligram twice a day, and the nausea subsided.
Can't help at all on the insomnia. It had the opposite effect on DH & I the first couple weeks. I've read that some folks on Chantix who can't sleep ask their doctors for temporary sleep aids.
Yeah, I was pretty worried about the constipation possibility, too, but, knock on wood, no troubles at all in that department. I do eat a big bowl of Fiber One in the mornings, tho.
Hope you're able to get everything worked out!