I know this is not the answer you are looking for but the fear that you describe is probably much worse than your stuttering problem itself. It sounds like you are anticipating stuttering and difficult words and phrases, this is indeed common among stutterers but is actually a self-fulfilling prophecy. My advice would be to tell the teachers upfront (probably not necessary now because they already know I assume) and just be a ''proud'' stutterer, do not apologize for your stutter just tell them that you have difficulty with your speech. I am about to graduate and trust me I feel bad for not deploying this strategy earlier in my life because the fear and constant worry about potentially getting stuck or stuttering is alot worse than the act itself. Nobody minds you stuttering, what they do mind is you being all nervous about it and not being social because of it. I actually got a lot of positive feedback because I was open about my stutter and not afraid to show it. Anyways all the best to you and let me know what you think mate!