I used to be have serious blocks as a kid and, as you know, things were not easy. Later in my teenage years, I learned I didn't have to speak. No matter what, I could always be silent. No matter how uncomfortable the other person is. I've formed a rather thick shell around myself, in terms of giving a shit (perceived confidence). Here's some things that have helped me: 1. Maintaining eye contact. Many people are naturally non-dominant, so looking them in the eyes gives you an immediate dominant position (perceived confidence). 2. Analyzing when and why I block, then forming solutions on how to avoid it next time. 3. Having multiple work arounds for EVERY difficult word. Synonyms, distractions, stories, or whatever gets you past it unscathed. I literally write these down and study them. 4. Planning my life for ease (pro-active), not reacting to situations. (not putting myself in precarious situations). Such as less verbal jobs or text/email prior to calling (so they know my name and I don't have to say it) 5. Reading out loud to myself. As much as possible, everyday. When reading, be as fluent as possible. Be confident (like an actor or politician). Be slow and breathe. 6. Generally be positive, not negative. Look at the sun, nature, loved ones, or whatever, and try to enjoy those things.