Congrats on making a great choice, Jeff!!! Four days is huge. But it's just the start. You've gotten great advice from the bad-asses above. But I wanted to throw in my two cents...
The trick is staying quit, right? Well, the attitude you have when you start anything largely determines your success. Choose to recognize the heroic shit you're doing. Embrace the suck. Quitting is a privilege reserved to those who have the guts to do it. YOU DID!!!
Choose to see withdrawal symptoms and triggers as reminders of the bad-ass thing you're doing. Click around in the Quit Groups...not only your group, but a few other months and years. Then recognize that all of those folks have been where you are right now and they are winning ONE DAY AT A TIME. YOU CAN DO THIS!!!
Yes, quitting sucks. But turn the tables on the Nic Bitch. CHOOSE to think of it this way...you GET to feel this shitty because you MADE the choice. You GET to feel like crap now, so that you keep your tongue and jaw. You GET to avoid feeding tubes and chemotherapy. You GET to avoid disfiguring surgeries. Those things won't be your future. All of a sudden quitting doesn't look so bad, huh?
Nicotine is out of your system. Congrats!!! You're running clean for the first time in a long time. CONGRATS. You get to avoid a parade of miserable experiences. CONGRATS!!! You get to bullshit on this site with others who not only know what you're going through, but are happy to discuss it. There are nothing but positives here...choose to see it that way.
Congrats, Jeff!!! You got this!!!