Hey Rollingstone, Day 4 was always my hardest.
I can't remember if you're doing drugs or some kind of NRT -- if not, Day 4 is REALLY it for you. The nicotene is out of your system by now, and the battle is purely psychological.
I get that you're angry about "not being able to smoke." I SO know that feeling, but it might help to remember that you really CAN (and, God forbid, just MIGHT) smoke any time you darn well feel like it. You "can't" smoke when you're broke, when the 7-11 is closed, when you're in church or a theater. You "can" smoke any other time you feel like it, so the real question is whether you really, really "want" to smoke. Only a small part of you does, and you know that. You know your body is already doing hand-springs and thanking you for not smoking, right?? You know what your body (especially your God-forsaken lungs) will do when you light up: You'll get all light-headed, your lungs will seize up as the betrayed organs they are, your mouth will be filled with a vile, oily residue, and your body will whimper, "Why? Why did you do this to me after 4 days of such wonderful treatment?"
Is it, Mr. Stone, that you are not able to smoke, or that you have become not willing to smoke? There is a huge difference, and until you forsake the unable for the unwilling, I fear you will always have unnecessary anger.
Until it's a choice, it will always be an intolerable burden.
(Wow. I just made that up!)