You are fine, I'm entering my 4th year of college, and I have a severe stutter. I've taken speech, English and a bunch of courses that required vocal presentations. Everyone is concerned about themselves, and a majority of students are grown up as well. You can always ask for accommodations, but I recommend you get yourself out there. My speech professor gave me the options of either doing presentations with her face to face or Infront of the class. I chose to do it Infront of the class so I could build character.