This might sound strange, but I hope you will really examine your feelings right now. Perhaps post a bit more about what you're feeling, or just open your word processing program and type a few sentences about it.
Down the road a couple of weeks, or maybe a couple of months, the nic bitch is likely to start whispering lies in your ears. One of those lies will be that the first few days of quitting aren't that bad ... and that you can always go through it again with no problems. If you have today burned into your memory, or at least written down somewhere, that lie can be refuted easily.
I'm only at 12 days, and my first few days quit already seem like a dim memory. For one thing, because of the fog, they were pretty dim to start with! But I must not forget what a pain they were, and that I never want to go through them again.
Staying quit, one minute, one hour, one day at a time.
--CB