I've heard good and bad about Chantix/drugs to quit smoking. The most important facet is that you WANT to quit.
instead of cold turkey, try cutting back. Give yourself a limit of how many you can have in a day and slowly cut it back.
Also, limit *where* you can smoke. My DH and I both smoke, but never around the children. So we smoke outside (in the cold) which drastically cuts down how much you really want to smoke in the winter and can help you quit too. We don't smoke in the car when the children are present.
Basically, find something that works for you that helps you quit *and* doesn't destroy your attitude. It's not nearly as important that you quit "right now" as it is that you quit, right? So take your time - don't force it too fast - and you'll get there.
When you're quitting, watch your blood pressure/stress levels. If you're getting too "cranky" it could be your stress and blood pressure rising because of the stress of trying to quit. High blood pressure is worse for you than smoking, and most doctors will grudgingly admit that (I was specifically told by my doc *not* to quit during my first pregnancy because I was so stressed about being pregnant). Take care of all your health, not just one part of it, to make sure you aren't robbing Peter to pay Paul, in effect.
Slow but steady wins the race.