Hang in there buddy. I was mortified of presentations in school and was extremely miserable whenever I had to. Later on in college, I was in a give-no-fucks phase that immensely helped. I guess we need to accept the fact that we are going to stutter. Ironically, my presentations and interviews improved immensely after that. Nowadays I don't even think about my stutter before a meeting or a presentation. My worries are exclusively centered around the content of the presentation. My job requires multiple telecons every week over really crappy audio and I manage quite well. I do stutter, but the frequency and intensity has come down a lot.