NOT A FAIL!
You're still in the process of adjusting to becoming a non-smoker is what's happening!
As Submaniac said,
"You can do it. Hell, you're stronger than me if you can go cold turkey. I had to use the gum and electronic cigarettes as a crutch. Anyways, way to go man! Keep it up."
Pseudolus gives you some good advice too, Allan Carr method.
If you've got to use something to help QUIT, I strongly advise against any product containing nicotine. They can help you cut down, but the final act of quitting is nicotine free step.
Will power is essential, so is a positive mind set, that you are a non-smoker now, not a smoker, and you can really only say that to yourself when NOT smoking.
Don't feel ashamed to use something like lobelia, it works, and in my case also helped me cut down on alcohol drastically, apart from boosting my breathing and cardio-vascular system.
A small plant in a pot is all you have to gropw to supply all your lobelia supply to get over the first few weeks without nicotine.
Good luck mate, don'y give in, even if you backslide, that's just part of adjusting, so QUIT!