I been doing presentations in the form of sprints at my internship for the past 6months so I know the struggle. For me personally my difficulty is when trying to teach a concept. That's part of my internship. Like I get stuck when I have a formula in my mind or a set path on how I'm going to get the words out if that makes sense. After 6months. Most of the fear is gone as apposed to when I done my very first one. BUT I still speech block like crazy haha. It's okay. I hope your presentation went well though!