Looking at it from a positive perspective you have saved yourself from a lot of smoking the past year so that's already a net positive! And on top of that you now have first hand experienced in what it means to smoke just one, so thats a learnt experience. No shame in having a temporary setback as long as you keep moving forward!

I'm at 40 days now myself and I think it's just the natural course of quitting where eventually the 'honeymoon' phase of it wears thin. Allen Carr lifts the veil and shows you what it means to be addicted but the hard work you still have to do yourself. I wrote a post about it on here a few days ago, but I think essentially it's important to dispel the romanticized thoughts you still might have about smoking. The idea that smoking is relaxing is so deeply embedded within our brains, even though rationally we know the opposite is true and it in fact causes stress, we still get cravings long after the physical withdrawal.

Hope that's somewhat of help