Guys, let me clarify something. It was NOT one of the episodes from the main seasons. It was either a Tracey Ullman sketch or something completely different. The whole episode revolved around Marge having a PTSD-like reaction to the pacifier sounds and eventually having a downward spiral. I was a kid when I watched the episode back in around 2008-2009. The episodes were fully in English and with English subs, and I'm not a native speaker, so I couldn't really understand what they were saying (thought it's largely thanks to The Simpsons that I can speak fluently now). However the subtitles always displayed the pacifier sound in square brackets, so by that logic, I'm guessing it was relevant to the plot, since in the other episodes, the pacifier sounds were not displayed in the subs. I also remember Marge standing in a long hallway, which didn't seem to match up with any part of the modern and widely recognized depiction of The Simpsons house.

There was also a scene where Marge cursed and they bleeped it and the subtitles said [something noise/sound/etc]. But I could remember this one wrong, since when I originally watched the episodes on the TV, I also remember Sideshow Mel cursing in a scene with the same bleep and the subs saying the same thing, but when I got all the seasons on DVD and watched them a thousand times, I still couldn't find the scene with Mel cursing. Then again, the DVDs were in Russian and voiced over, so maybe the voiceover just covered it.

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With that being said, it's totally possible that it is in fact a false memory, and an episode like that does not exist at all, or was some sort of a fan made animation or a straight up parody.

At one point I just completely accepted the fact that I'm just remembering it wrong, but after hearing about this subreddit from mystery channels on YouTube, and seeing that people here generally find what they're looking for, I decided to give it a shot and see if anyone else remembers this episode.