Completely agree with yuri here.
If you fulfilled your addictions thirst for that orgasm reward while watching porn itd be a relapse. And when that surge of dopamine hits you, do something to stop it from continuing. If it continues to rise it starts to take over, as im sure you are well aware.
I would edge for hours, my eyes red from staring at the screen and scanning for videos that would get me off. Then id be interrupted, like my lunch break would be over or id have to see a customer, but id still have that dull ache of dopamine in my gut. My mind would race with images of the porn id edged to and i couldnt think straight. Id excuse myself for a smoke break then fap one out in the stairwell in a few seconds.
Dont worry, you didnt relapse! Good control mate!