I'm not anxious at all when public speaking, actually - I simply know my limits. Speaking is very difficult for me; and my life has become a lot easier after I just accepted that and instead of actively placing myself in situations that are difficult, just... not doing that. Yes I have a life outside of my education, yes I'm in speech therapy, no, my stutter will not get better; There's zero reason for me to seek out embarrasment and frustration. I think that for many people it's perfectly okay to realize their speech impediments are, well, impediments. You're not going to run a marathon with a sprained ankle. Don't do it anyways in the hope you'll get better, you'll just frustrate yourself and look stupid doing it.