Stutter worst when I've been planning what I want to say

Stutter worst when I've been planning what I want to say I'm not sure what I've got right now could be called a bad stutter, but it's quite a big part of my day to day life. It seems to only come around when I've been planning what I'm going to say extensively. Examples include - ordering food at a restaurant and reading off a menu. Always happens - university seminars when I'm constantly thinking and going over what I want to say and refining it - when I really want to tell a story and get pretty excitable over it and then stutter The way I've developed my management of it is that I usually just go into a sort of loop of 'uh uh uh uh' for a few seconds or so then either change the word or finally get it out. In normal conversations I flow almost perfectly, it's only limited to situations like these. I'm curious as to if anyone else had experienced something similar and how they deal with it. I wouldn't say its anxiety related as I'm pretty confident in social situations generally and don't have a problem with public speaking for example (plus I'm pretty outgoing, love making people laugh etc and not that shy). The only thing I can think of is that I've got myself into a sort of catch 22 situation, where I always think I'm going to stutter in these situations and then that generates anxiety about stuttering then obviously it happens and the cycle begins again. cheers guys, first time posting on here so some discussion about it will be nice as I don't really know anyone else who stutters.