I've honestly had those same fears, just serious pains in the guts just thinking about doing all this stuff that I am sure is trivial to everyone else who doesn't have a stutter. At some point, I just have to say f*&@ it and do it, and it's usually not as bad as I think it would be. I might block hard or seem really weird or off but most people really don't care, and it gets easier and easier when you keep putting yourself out there. Hang in there, you are not alone!