I have the experience you describe often, I think that is how it plays out for most of us, I keep hearing people describe it in the same way you do. It's like standing at the crossroads of change, where you are tempted to go down the old familiar path, the one that brings instant gratification and short term relief from uncomfortable feelings, but you have this hunch, as small voice saying there is a better path, but it is unfamiliar and uncharted and will be uncomfortable to travel along compared to the wide open, well-trodded old path.
I think the whole thing of rewiring the brain is that each time we do NOT give in to the loud voice saying how wonderful and harmless it would be to watch the porn, that voice weakens, that neural pathway weakens. Going through that process again and again is what is is all about, that is how the brain remoulds itself. The old pathway will become overgrown and disused after a while and the new one will become easier and easier to go down.
Hope this helps, good luck!