Anxiety, fear or what?

Anxiety, fear or what? Hi I need some tips for my physiological stuttering. Often times I think of saying a word and I basically can’t say that word. Words related to an and e. And specifically in certain occasions I stutter on other words as well. I feel like it’s a sign of anxiety and stress combined. I feel like I have to do something very small in order to fix this but don’t know what. Please help.