Well I don't stutter so I shouldnt give advice but I have quite a lot of experience with oral presentations so I will give some anyway. Maybe it will be useful. You told your assessor you stutter. Perfect. They know you have a medical condition that is making you speak the way you do. That is, if you stutter, it would be quite immoral from them to take off any points you may get only due to you blocking, or make some comments about it. You talk with a stutter, you cannot really control that, therefore just focus on the talking part. Say what you want to say without worrying about blocks. They will come anyway, but as already mentioned, if your assessor isn't a cunt of planetary sizes, they will not take any points from you. Feel free to DM me if you were to need some further advice on how to make a speech or project interesting and enjoyable to yourself and the audience. (God i sound like some cheap salesman, I apologise.) And again, I know that I dont stutter therefore I cannot know what it is like to actually stand out there and block, but I felt like I can offer some help so I did. I hope that is understandable.