Good luck. To help you feel less nervous, you could start your presentation with a disclaimer like "Some days, I stutter a lot. And some days, you don't notice that I have a stutter. If I stutter today, just remember to let me finish." And have someone film you while you're presenting. Looking at your video will help you see your secondary behaviors and nervous behaviors. Some students have nervous smile that look like smirk and they don't know that. Some people who stutter covertly frown a lot and some of them do not know they are frowning and lose the chance to explain their frowns. Filming your first college presentation is your best chance to look at what your face and your body does when you are nervous.