Pls share when did your milk supply dip? And how fast it took for the milk supply stop?

My milk supply was in a roller coaster timeline. I went back to work n it dipped a lot as I did not have time to pump like I was at home. It was demoralizing when the supply was not enough for a day. I eventually so called gave up trying to increase after a month of 'fight'. I stopped pumping and the dripping of milk gradually became lesser and not long after a few days, it dried up.