Psychiatric nurse here, can affect it on some occasions like introducing myself to new patients, their family members or other staff; answering phone calls; calling next-of-kins (especially when the patient has a difficult name to say), asking about blood results (fuck the letter B), etc. Although I've found that I've improved in a way to the point where I don't hardly stutter on the word 'breakfast' anymore, although I do still say "lunch" or "tea" or "supper" instead of "dinner." The one that does get me sometimes though is the morning handover, we have a weird system where the first male staff member to come in generally takes the male handover for that ward, and vice versa. That means writing down notes to give that handover to the rest of the staff when they come in. This is actually grand usually but can be a bit deterring. I still try to do it as much as possible though, and a manager of mine seemed to catch on recently and was quite helpful when I was struggling a bit. (Sorry for wall of text 😂)