I know from myself I have a lot of pride and don’t like to talk the teacher and make things easier by asking for accommodations, but sometimes you have to. I’ve only had one professor give me a hard time about this and I presented and did all right not my worst job. What really aggravated me was after he was giving a speech to the class about how presenters can’t look nervous and shaken and looked at me as he said this. Thought that was a really shitty thing to do lol. Besides that though all my teachers have been very accommodating to me. You should tell your teacher you have a stutter and it gets worse with anxiety and ask if you can record a presentation or present only to them. We shouldn’t fail exams just because time constraints or stuttering only should fail if the content is not up to par. But hey you went out and did it anyway and If you don’t get a good grade or it fixed, pat yourself on the back for conquering your anxieties!