Dear Bolivar,
Your decision to quit is wonderful. Your choice of Cold Turkey is a great one.
I hear your fear when you describe withdrawal as agony. I cried my eyes out the day before I quit. Let me tell you that my fear of withdrawal was far more agonizing than anything I went through in withdrawal.
There is no way around, only through.
The methods that "assist" with quitting smoking actually drag out withdrawal, some for many months. Cold Turkey gets it over with as fast as possible. Smack in the middle of it, it may not feel very fast, but once you have tucked some time in, your retrospective will be, not only that it wasn't that long but also, that it was 100% worth it!
I highly recommend reading these:
One of these days I will get around to writing my spin, One Task At A Time. That is how I made it through withdrawal as comfortably as I could. I would decide, "Okay, I'm just going to do this." Then I would do just that one thing without smoking (pick something, anything: taking a shower, getting dressed, eating a meal, driving to work, etc.). And then when I recognized that I lived through the task without nicotine, I would tackle another one, just this now.
Reading through it is a great way to spend a craving. When you get through the immediate recommendations, cruise this:
Take care of yourself. Heal.
Kay
(After 25 years of smoking: 1 Year, 11 Months, 15 Days of Freedom!)