What do you do when you feel physically and mentally really tired in a longer conversation because it’s exhausting to keep the stuttering under control?

What do you do when you feel physically and mentally really tired in a longer conversation because it’s exhausting to keep the stuttering under control? It’s sometimes kind of sad because I would have a lot of things to say but I’m just too tired to keep the stuttering under control. When I concentrate myself usually i can avoid the worst parts of stuttering but this is exhausting in a long talk or in a long day. So when I am tired, either I keep on talking but with worse stuttering so that I’m feeling more uncomfortable and the understanding of my speech gets more difficult or i just stop talking and be quiet. Sometimes I’m feeling sad about this because I would have things to tell but I can’t.