Presentation about myself?

I was given a task to do a presentation about myself by my technical english lecturer, Mr Mohd Shafierul Zaman. As I was preparing my slides on my presentation, I realised that this was a good opportunity for me to enhance my speaking skills and at the same time build confidence in myself. Preparing the slides for the presentation was a simple thing that anyone could do but the disaster started when I felt it was rather intimidating when you have to speak infront of your classmates standing all by yourself with nothing else to depend on except yourself alone. What could I say more? Even though, the presentation was meant to be just about three minutes it seemed to me like it was for three hours. I just don't know why whenever I am facing a crowd or audience I feel nervous. However, during this presentation I felt that I was able to control my feeling of nervousness.