I can relate to what you going through. I also suffer from slightly stuttering and will be attending in-person college classes. What I would suggest is to try taking deep breaths, and speaking at a moderate flow, Don't rush what you have to say, this will make it worse. I am working with a speech coach, and these are some of the things he taught me, let me tell you it really works. Just relax and breathe slowly!! Good luck in your classes