It´s always nice to hear that we are not alone with this everyday shit ; ) I have the same problems as you on the phone at work (I´m a graphic designer). I just can´t immediately say my name or my companys name. People sometimes laugh and say something like "don´t you remember your name?" yeah people don´t think... At the beginning I cried a lot after the phone calls, but now I do not let it get that close to me anymore. I guess at some point you just kind of accept it, because it´s a part of you. Also whenever I have to call someone, I always leave the office room. If I have the choice, I always avoid talking on the phone. My colleagues know that I stutter, they have never made a stupid comment. I´m thankful for that. But I don´t know if people always realize that I stutter, because my stuttering is kinda dumb. I block completely and get no sound out. I often use filler words or I do a lot of pauses. I also sometimes pretend to search for the word... but its a technique that you can´t do when you are on the phone. If I would be in your situation, I would be stressing out to, but I guess you would be better off telling your instructor that you are a stutterer and that you would feel more comfortable him knowing that. I often take magnesium (every second day), because it is muscle relaxing. Our vocal cords are just muscles and I have the impression that it helps. But it´s not easy to say, because I have always had phases where my speaking is two weeks better and then again two weeks very bad. just know you´re not dealing with it alone and think positively.