Hi, Susie. Really glad that you are reflecting on your recent experience and continuing to learn from the board. That's awesome.
My own experience is that smoking is an addiction that has physical AND emotional AND ritual/habitual aspects to it. For me, withdrawal was a physical crisis, no question. Headaches, the shakes, disorientation, insomnia, agitation, weird skin stuff, brain fog, the whole gruesome enchilada. It truly sucked, but thank heavens that phase was temporary. Just like detoxing from every other chemical addiction. (Tho nicotine is more potent than many others.) It passes. Then there are the emotional and ritual/habitual aspects to tackle. These take longer to resolve, but they are far less intense than the initial withdrawal.
All of which is to say that quitting requires multiple strategies to deal with different facets of the experience. Successful quitters usually need a portfolio of tactics to mix and match and alternate... things to do with our hands, our mouths, our minds, our bodies, our emotions. Staying busy is key, as is the willingness to pivot to the next tactic on your list if the one you're trying isn't currently working. Think of it as a creative challenge!
At the end of the day, though, Yoda is right that the only certain way to stop smoking... is to actually stop smoking. Procrastination keeps us addicted. If I had a penny for every time I said "Next week..." or "Next month..." or "After my exams..." or "Once my dad's out of the hospital..." I'd be a very wealthy woman, and have a lot fewer health issues.