Worried about cognitive side effects of my stutter

Worried about cognitive side effects of my stutter But for the generous patience and accommodation of my interviewers today, I truly may have broken down. Today was the latest in a lifelong series of me gasping, hitching, and cluttering my way through an interview, and I'm genuinely starting to worry that my troubles may run deeper than just the stutter itself. There was a time not too many years ago (I'm 28 now, so we're talking college age, early twenties) where I described my speech impediment the same way a lot of others do: "The thoughts are all there, they're in my head, they're just locked up behind my difficulty speaking." Nowadays, I'm starting to have my doubts. I have the type of stutter that's accompanied and exacerbated by faulty breathing, to the point where it feels like I'm starving my brain of oxygen every time I speak. I'm forced to wonder if that's not just dramatized sensation and is actually what's physically happening to me. All I know is that it's led to some truly humiliating mental blanks, typically in those very same situations where it's already hard enough trying to get past the stutter and make the case that despite how I sound, I know what I'm talking about. It doesn't seem to matter how much I prepare ahead of time, memorize, write down - it all goes out the window when my entire brain stalls and I can't remember how to string words together at all. I come out of every experience physically and mentally exhausted, and even if I can recover at least the gist of what I wanted to say (and sometimes send an apologetic follow-up email expressing it in writing) the creeping feeling I keep getting is that the more times I go through this cycle, the more cognitive drain and fatigue build up over time, and the easier it is to get mired in the type of brain fog I felt when I had COVID. Even writing, my usual go-to workaround for ideas I'm having trouble speaking aloud, feels like a much slower and more labored process than it used to be. I've tried researching the topic on my own and have found some info about anxiety and all the delightful ways that can interact with a stutter to become a feedback loop, a little bit about ADHD and the way it constricts working memory, but trying to dive deeper into the cognitive aspect specifically tends to pull up a lot of pages about primary progressive aphasia, which 1) doesn't address the stuttering and breathing issue, and 2) is something I should hope I'm a bit too young to be worrying about, relevant or not. TL;DR: Lifelong stuttering/breathing issues have me worrying (perhaps irrationally) that I'm slowly suffocating my brain and draining my INT stat. Is this a familiar experience to anyone else, and are there any further insights about it that I might be missing?