This was interesting to read. I guess I don't realize that people may have a stammer or stutter and not realize it. It brings me back to being put into a speech therapy class in school when I was very young, and having the teacher assume I had no idea I stuttered. I thought it was just her/because I was a kid. I remember when I first started developing a speech block, where you can't get your words out at all. I was crushed because I already had a stutter all my life, and how I have this, too? I was really crushed, I was already so self conscious about the stutter, and it just got worse with the new speech block. You said you're confident at speaking, even though you have a lisp, which is great. Have you ever had to address your lisp to someone you were talking to? I found that if I am having a bad day, stuttering a lot, just telling the person I'm speaking to up-front that I have a speech impediment can ease the tension. If you confidently tell them, and not be apologetic about it, they mostly just accept it and move on. Let your confidence guide the mood of the room. I know it's hard, but if you're not sorry about your stutter, no one else should be, either. (Some people find it easier to make a joke about their stutter. Sometimes I do that, but honestly I find it just as easy to tell them straight-up, and just move past it. Normally it's accepted just the same.)