I don't think there is anything all that unusual about your stutter as you describe it. It sounds like you're very internalized with it. You have certain sounds you react to and you are using avoidance techniques such as word substitution to get out of them. Everything I've heard/been told indicates that for most people who stutter, immediate and unavoidable demands are the hardest words to say. Saying your name, saying 'gmail' at the end of your email when asked for it, etc. etc. Seeing a good SLP you connect with is probably a good idea if you can afford it. There is no reason whatsoever that your stutter should stop you from achieving ALL of your life goals, but if you continue to use avoidance tactics and substitutions, you have a higher chance of letting your stutter limit you. I think it would be good for you to learn more about what your stutter is exactly, why/when it occurs, and of course actual techniques to help with your fluency. Awesome you want to be a teacher - let that be your inspiration :)