I have been smoke free for 18 days and I went out with friends, drank a bit...on the way home, I didn't think twice about my Quit and bought a pack. I'm feeling like crap for doing it, but I did. The next morning, I poured water over the rest of the pack. I feel like a failure, but I don't want to throw in the towel. Has anyone else experienced that? Could use a bit of a pep talk...