I never began to stutter until I was 19. Not too sure if there is such a thing as adult-onset stuttering or what but that's when it hit me. Might have hit as that was when all the shit in life just came down on me and I didn't care anymore. That's for another time.
Last time I had a full on sugar/carb binge, aka my birthday, I get the stuffy sinuses, headaches and lovely bowels. So yeah I guess I do have the inflammation thing going on as well. Sometimes I liken it to a bad hangover.