I know, I should never have started, and I hear this process can get pretty ugly. Here's what I've noticed:
Day 1) General unease but very motivated to quit.
Day 2) Hacking up these unspeakable horrors. Terrible fiending.
Day 3) Lung function and dexterity of sinus cavities have improved. Mental addiction quite possibly has gone away.
One thing that I'm doing to help is that whenever I discover an urge to have a cigarette, I breathe very deeply a chestful of fresh, outdoor air. To remind myself what I should be breathing in, instead of the carbon monoxide and various other assorted chemicals. I hope the mods don't mind if I continually update the following hourly count as a visual reminder will keep me motivated.
Total hours without a cigarette: 57.
I do have a few ideas for you.
After a few days, which you seemed to have endured, all the nic will be out of your body. All that are left now are the mental processes involved with the drug. These are the real culprits in addiction. Mine were anxiety and desire. They were defeated by knowing that they are responses to the drug, and not inherently mine, so with time they faded.
Taking steps now to improve your health will help you build up defenses against wanting to smoke. Heavy lifting, solid diet based on primarily natural foods, lots of water and tea, 8-9 hours of honest sleep, all these will help you feel better than you thought imaginable. Know that returning to the habit will only undo all the good work, and if you want to quit again you must labor on to return to this basic state.
Avoid alcohol. It will dampen your reason and invigorate your desires. Only after you have quit for a while should you attempt drinking. As an aside, health not withstanding, a hang over while abstaining from smoke will be far more tolerable.
PST me if you need encouragement. Fight the good fight.