I’m on the same boat as you. I actually went to a speech therapist once in the eighth grade and I talked flawlessly. The only thing she told me that I remember is that I didn’t really maintain eye contact but that was mainly because she was pretty hot. It has become more noticeable for me in the last couple years and I’m guessing starting college and all the stress that comes with it got to my head. Looking back, I probably stuttered at my least around the time that I went for the speech thing and then it caught up to me in recent years.