I would blame the professor. If it takes you the whole class period to present, then let it b. Don’t change your career because you’re going to regret it your whole life. I gave up on something because of my stutter.. was it worth it? No, I still think about it until today. Just go and do it and if it fails.. try again until you realize “hey I tried my best” find something else. Don’t give up on your dreams!